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Parting and Grooving
Cutting off and making grooves
In parting operations, the objective isto seperate, as efficiently and reliably
as possible. one part of the workpiece
from the other. A straight cut is made to
a depth equalling the workpiece radius
of a bar. In grooving operations, the prin-
ciple is the same but with the difference
that the cut is shallower and not taken to
the centre. Grooving operations are less
sensitive in some respects because the
grooves are usually not as deep, instead
shape, accuracy and surface finish are
often demands that need more atten-
tion.
The machining process can be compared
to a facing operation in turning, where
the tool is fed radially into the centre, the
difference being that in the parting ope-
ration, the tool is a thin blade making a
narrow groove. There is material on both
sides of the tool and thus the material
to be cut through should be as little as
possible and the width of the cutting edge
should be small. This makes considera-
ble demands on the performance, chipforming and stability of the parting tool.
As the tool moves to the centre, and if
the spindle speed is kept the same, the
cutting speed will gradually decrease un-
til it reaches zero at the centre. In CNC-
lathes, the spindle speed is increased
as the tool moves towards the centre.
Any decrease in cutting speed is disad-
vantageous for the tool and one that can
make severe demands on the cutting
edge. As the edge approaches the cen-
tre, pressure increases as the tool is fed
in at the decreasing cutting speed.
Chip evacuation is also a critical factor
in parting operations. There is little opp-
ortunity of breaking chips in the confined
space as the tool moves deeper. The
chip-formation geometry of the cutting
edge is devoted largely to form the chip
in order for it to be evacuated smoothly.
Consequences of poor performance in
this respect are chip obstruction which
leads to poor surface quality and chip
jamming, leading to tool breakdown.
External operations : 1. Parting off, 2. Grooving, 3. Turning, 4. Profiling,
5. Undercutting, 6. Face-grooving, 7. Threading
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Machining factorsModern parting and grooving tools are,
in addition to being very productive, also
versatile. Most types of turning ope-
rations can be carried out with todays
indexable insert tools. Generally, opera-
tions that do not require the large over-
hang that the adjustable blade type oftool offers, should be performed by the
shank type or Coromant Capto tool,
where the blade is an integrated part of
the toolholder. Maximum rigidity, which
is vital in parting, grooving, profiling and
turning operations, is offered by this de-
sign. However, the adjustable blade type
tool does have an added advantage in
that it offers the flexibilty of having adjus-
table overhang when different diameters
and deep groove-depths are involved.
It provides the shortest overhang with
maximum stability for different bar dia-
meters.
The main cutting data and tool definitions
in parting and grooving operations are:
cutting speed (vc) which is the surface
speed at the cutting edge
spindle speed (n), the machine spindle
revolutions per minute
the straight, radial feed towards thecentre (fnx)
the radial depth of cut capability of the
tool (ar) - the distance from outer dia-
meter to the centre or bottom of groove
Vc
fnx ar
Parting and grooving tools for different applications.
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Tool SelectionGenerally, minimize tool deflection and
vibration tendencies through :
- selecting the toolholder or blade withthe smallest overhang,
- choosing the largest possible shank
dimensions on the toolholder
- choosing the blade or toolholder with
the largest possible insert seat (width)
- choosing a blade height which is at
least equal to the insertion length
First tool choice for parting operations
should be tool blocks with blades, where
the blade can be adjusted to optimize
the tool reach/tool overhang. Screw-
clamp type insert clamping is the best
choice from a stability point of view. A
reinforced toolholder will increase stabi-
lity even more.
The tool overhang should not exceed 8
times the insert width.
Different entering angles rhave their uses:
The neutral insert provides a strong cut-
ting edge with the cutting forces being
mainly radial, providing a stable cutting
action, good chip formation and tool-life,
and excellent results through alignment
in cut. There are three types : neutral (N),
where the cutting edge is at right angles
to the feed direction of the tool with an
entering angle of zero degrees; right (R)
and left (L) handed inserts - each havingan entering angle of a few degrees.
An entering angle of a few degrees is,
however, useful in parting operations
in that the end of cut can be finished
more advantageously. If a neutral insert
is used, the part of the workpiece that
has been cut off is left with a very small
diameter protrusion (pip). A parting tool
with an entering angle can be used to
remove the pip when the cut part drops
away. The hand of the insert is selected
so that the leading corner of the cut-
ting edge is next to the part being cut
off. The pip is then left on the workpiece
while still in the machine and removed
by the cutting edge that faces throughto the centre. Burrs will also be reduced
through the effect of the entering angle.
Inserts with an entering angle of 5 de-
grees are available in CF, CM and CR
geometries. Inserts with 10 and 15 de-
grees entering angles are available in CS
geometry.
Tool block with spring-clamp tool blade for tool overhang adjustment and a reinforced blade.
Cutting off the pip in par ting operations.
RH
N
LH
Pip and burr free machining.
Parting off
Entering angles.
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To avoid or minimize pips and burrs, use
a sharp (ground) insert, right- or left-
handed (GF and CS for instance) with
the smallest possible angle. Although a
large angle reduces pips and burrs, the
tendency is for the cut to be more une-
ven and surface finish and tool-life not to
be optimum. The size of the pip is alsoaffected by how the workpiece part that
is cut off breaks away because of the
centrifugal forces. The size and length of
this part affects the point of parting and
for this reason, the size of the pip can be
minimized by supporting the growing in-
stability of the workpiece being cut off.
Select dedicated inserts for the opera-
tion in question for best performance
and results.
For large depths of penetration in par-
ting, the double-ended blade solution is
recommended.
For parting small diameter bars or com-
ponents, cutting forces should be mi-
nimized through selecting small insert
widths and sharp cutting edges (such as
geoemtries CS and CF).
When parting thin-walled tubes, minimize
the cutting forces by using sharp inserts
with the smallest posible width, for in-
stance CF and CS geometries.
The choice of insert-width is a compromise
between tool strength and stability on the
one hand and workpiece material saving
and lower cutting forces on the other.
Application factorsFor maximum stability during machining,
screw-clamp toolholders are always re-
commended when any axial machining
(turning) is involved. A spring-clamp
tool is only recommended for radial
machining, such as in parting off.
Recommended torque values are pro-
vided for the screw-clamp type tools. It
is important to follow these and not to
over-tighten the screw the maximum
torque is about 50% higher than what
the table indicators.
Feed rate reduction is often advanta-
geous for performance when machining
towards the centre to minimize the
pressure on the cutting edge. Also be-
cause of the reducing pip size, the feed
should be reduced by up to 75% when
approaching the centre, around 2 mm
before the part comes off. Cutting data
should be adapted so as to minimize
possible vibration. This may lead to the
tool-life being doubled.
Stop the parting off operation before
reaching the centre because, due to its
weight, the disc in question could fall off
before completion. Leave the pip on the
bar to be faced off with a conventional
tool.
Parting off with CoroCut 2.
Spring-clamp tool for radial cuts and screw-clamp tool for radial and axial cuts.
Feed reduction towards centre.
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Cutting fluid should be used with copi-ous amounts directed onto the cutting
edge. Coolant should be supplied con-
stantly while the insert is engaged in
cut. A coolant adaptor can be mounted
with the supply directed from above.
For tool blocks with a parting blade, the
coolant supply can be connected above
or from either side of the block.
Tool positioning is an important factor
for success in parting and grooving ope-
rations. It is vital for the cutting tool to
be mounted accurately at a right angle
to the centre line of the workpiece to
be machined. Deviations will mean ad-
ded stresses on the blade as it is fed
into the workpiece and result in machi-ned surfaces that are not flat. Vibrations
arise and chip formation is often disad-
vantageous.
The tool position as regards the centre
height of the cutting edge is also impor-
tant. Deviations from the workpiece cen-
tre line should not be more than +/- 0.1
mm. Excessive deviations change the cut-
ting action with higher cutting forces. This
can also lead to added friction between
tool and workpiece resulting in reduced
tool-life which also affects the size of the
pip.
Creating the best stability for the cut-
ting tool set-up is especially important
in parting and deep grooving operations.
The tools involved have long thin blades
which are necessary because of the
need for accessibility. The overhang of
the blade should be minimized with the
smallest possible tool reach (ar) which
means that the adjustable blade is, in
many cases, the best alternative, eventhough the shank tool with integrated
blade is the most rigid. Wider insert
widths (la) can be used to improve stabi-
lity but at the expense of wasting more
material in the cutting off operation.
The largest possible tool-shank (h and b
dimensions) should be chosen as well
as the largest blade height (h1) and in-
sert seat width (la).
When parting a bar with a drilled hole,
ensure that the depth of the hole is suffi-
cient for the width of the insert. If the hole
has been drilled with a pointed drill and
the parting tool has to enter the coned
part of the hole, the blade may deflect,
generating excess forces on one corner
of the insert and which may lead to insert
chipping and inconsistent tool-life.
Mounting an insert in the CoroCut spring-
clamp tool involves using an excentric
key to open the insert seat for the insert
to be pushed into place. Removing the
insert involves a similar procedure to
pulling the insert out of the seat.
Mounting an insert in the Q-Cut spring
clamp should always be preceeded by
applying a little coolant or oil on the insert
seat to further increase the toolholder
life. Use the special Q-Cut key for moun-ting and removing inserts to avoid cutting
edge damage. No pivot-holes are provided
in either the 570-type exchangeable head
tool (R/LAG 551.31) for parting and face
grooving. For these items, a small rubber
mallet should be used to tap the insert
into its position. The tip of the yellow key
should be used to extract the insert.
Typical clock-spring chips from
parting off.
Centre-height accuracy of cutting edge is important.
Important right-angle positioning of tool.
Cutting into a drilled hole correctly.
Cutting fluid is important in parting
and grooving.
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Machining grooves has many similarities
to parting off, especially deep grooves. Alt-
hough the same toolholder systems can
be used for both parting and grooving in
many instances, the insert geometries are
dedicated to provide optimum performan-
ce and results. Grooves vary : there are
shallow grooves, deep grooves, wide groo-
ves, external grooves, internal grooves and
face grooves.
For single grooves, a suitable insert is
applied to match the size and limits while
wider grooves can be machined in various
ways. Dedicated insert geometries, forlow and high feed applications, contribute
towards optimizing the grooving operations
by giving specific benefits.
For single-cut grooving generally, straight
cuts can be made for groove widths of
up to 8 mm giving the best method, chip
control and tool-life. Tailor Made inserts
are made to match the specific groove
size. Chamfers can also be part of the pro-
gramme. Insert geometry GM is recommen-
ded for general groove turning and GF for
precision grooving. Processes should be
optimized in relation to the production volu-
me. The TF and CF insert geometries have
Wiper design on the side in order to gene-
rate high surface finish on the sides of thegroove. Chamfering of the groove can be
carried out with the CoroCut 2 system using
the corners of the grooving insert. For volu-
me production, the Tailor made alternative
of an insert that produces the complete
form of the groove should be considered as
this often halves the machining time.
The most common methods of rough-
machining wide grooves, or turning bet-
ween shoulders, are : multiple grooving,
plunge turning and ramping. A separate
finishing operation is usually required.
Grooving
- If the width of the groove is smaller
than the depth, multiple grooving is the
most suitable method.
- If the width of the groove is larger than
the depth, plunge turning is the best
method.
- If the bar or component in question isslender or weak, ramping is recom-
mended.
For multiple grooving (step-over grooving)
cuts to make a wide groove, the widest
possible insert should be used and in
an alternative plunging-order. The best
chip-control and tool-life is obtained by
using an insert width leaving rings which
are then removed. The insert corner is
protected and chips are directed into the
middle of the chipbreaker. Recommen-
ded ring width is 0.6 to 0.8 times the
Machining a wide groove.
Inserts for single grooving cuts and shallow
grooving toolholders.
Multiple grooving, plunge turning and ramping are methods to make wide grooves.
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insert width. It is often more suitable for
small batch production and face groo-
ving. This is a flexible method which is
quick to programme and geometry GM is
the first choice for this method.
For plunge tuning of wide, shallow groo-
ves, the axial turning depth should not be
larger than 0.75 times the insert width.
Geometries TF and TM are designed for
axial and radial feed directions and are
recommended for both plunging and ram-
ping of grooves. Chip control is usually
advantageous. To improve the machining
process and tool-life, lower the cutting
forces prior to changing feed direction to
minimize vibration tendencies, stop the
feed in corners to minimize vibrations.
Strive to make use of the three edge-zones (two sides and one end) of each
insert to maximize utilization.
Ramping of wide grooves, involves twice
the number of cuts but is suitable for
when the bar or component is slender or
weak. Radial forces are smaller, thus ge-
nerating less vibration tendencies. Chip
control is also good and notch wear is
reduced especially when making groo-
ves in workpiece materials with poorer
machinability.
To achieve the best roughing results in
the form of a flat groove-bottom with the
best groove-side quality, see under Tur-
ning and Profiling.
To acheive the best finishing results,
care should be taken when machining
the corners of the groove. As the insert
cuts the radius of the corners, most of
the tool movement will be along the z-
axis. This produces a very thin chip at
the front cutting edge which may lead to
rubbing instead of cutting and hence vi-
bration tendencies. To prevent this, the
axial and radial depth of cut should be
0.5 1.0 mm and the first cut should be
made into the groove, axially, where the
groove radius joins the flat bottom. Then
optimize the process in relation to the
batch sizes. The Wiper effect generates
good surface finish with Ra values down
to 0.2 microns.
Multiple grooving a wide groove.
Plunge turning a wide groove.
Turning operation.
Finish machining a wide groove.
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Circlip groovingThe need for circlips on shaft and axle
components is very common and there
are two systems suitable for these ope-
rations. Both systems have specific
widths for circlip grooves.
First choice is the three-edge T-Max U-Lock154 system with groove widths of 1.15 to
4.15 mm for external and internal appli-
cations.
There is a tool cost advantage with the 3
cutting edges.
Second choice is the CoroCut 2 system
using the GF insert geometry with widths
1.85 to 5.15 mm for external applications.
UndercuttingRecesses for clearance, such as for sub-
sequent grinding operations on various
shafts and axles, require dedicated in-
serts with round cutting edges that are
sharp and accurate. For this there are
small and large applications.
For the shallow recesses, CoroCut 1 or
2 with RO and RM insert geometries are
recommended.
For deeper recesses, T-Max Q-Cut system
with insert geometry 4U is recommended.
Face groovingMaking grooves axially on the faces of
components requires tools dedicated for
the application. A face grooving tool has to
be made to clear the round groove which it
is making the toolholder has to be cur-
ved. Both the inner and outer diameter of
the groove needs to be taken into account
for the tool to be accommodated.
First-cut diameter ranges are indicated forvarious tools. When a groove is machined
in several cuts, only the first cut needs to
be considered as the tool is then accomo-
dated to machine smaller groove diame-
ters.
For face grooving, the following general
points apply :
- minimize tool overhang to limit any
vibration tendencies
- keep the infeed rate low during the
first cut to avoid chip jamming
- start machining the largest diameter
and work inwards to obtain the best
chip control
- if chip control during first cut is unsatis-
factory, dwelling can be introduced.
Circlip grooving with U-Lock (left) and CoroCut 2 (right).
Facegrooving
Undercutting
Choice of RH and LH tools
depending upon rotation.
LH
RH
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Wider face grooves can bemachined in different ways :1. Roughing through multiple grooving
cuts, where 0.5 to 0.8 times the insert
width is used to open up the groove to
the required width after the first cut. A
finishing cut can then be made along
the sides of the grooves and the groo-ve bottom face.
The largest diameter should be cut
first followed by work continuing in-
wards. The first cut is with chip con-
trol but not chipbreaking. The following
cuts are with chipbreaking. When re-
tracting, offset the insert slightly from
inner edge of groove.
2. The second roughing method involves
plunge cutting and finishing as in
the previous method. The axial depth
should not be deeper than 0.75 times
the insert width. A good indicator is
that if the groove is wider than it is
deep, plunge turning is recommended.
If the groove is deeper than it is wide,
multiple grooving is recommended.
3. Finishing can also be performed ac-
cording to three cuts : cut 1 within
given diameter range and face towards
the radius; cut 2 finish outer diame-
ter and radius and face inwards; cut 3
finish the inner diameter to the cor-
rect groove dimension.
If the inner side of the tool
blade rubs against the
groove side, make sure
it is the correctly cho-
sen tool for the diame-
ter range in question,
lower the tool slightly
below the centre-line
and make sure the tool
is parallel to the axis of
rotation.
If the outer side of the tool
blade rubs against the groove
side, make sure the tool is correctly
chosen for the diameter range in ques-
tion, lift the tool slightly above the centre
line and make sure the tool is parallel to
the axis of rotation.
Toolholder selection is critical for face groo-
ving from the CoroCut 1 and 2 systems as
well as T-Max Q-Cut and CoroCut SL. For
grooving depths of up to 4.5 mm, a special
toolholder for shallow face grooves shouldbe selected. Suitable inserts are grooving
and turning insert geometries type GM,
TF and RM. For small first cut diameters,
T-Max Q-Cut 7G and 7P are suitable.
Internal groovingMost of the methods for external groo-
ving can be applied to internal grooving.
Precautions may have to be considered,
as with boring in general, to ensure chip
evacuation and to minimize vibration ten-dencies. Tool size, overhang and set-up
should be optimized and tuned bars be
a possible solution, especially when the
tool overhang is 3-7 times the tool diame-
ter. CoroCut SL is a good solution where
tool assemblies can be made to optimize
the application. Solid and tuned adaptors
are available within the SL-system.
CoroCut with dedicated insert geome-
tries GF, GM, TM and TF are suitable for
internal grooving For smaller holes (dia-
meters below 25 mm) the T-Max Q-Cut
151.3 system with insert geometry 4G
is recommended.
Multiple grooving or plunge grooving,
especially with narrow inserts, reduces
vibration tendencies when making wide
grooves. Finishing operations can then
be performed seperately.
Chip evacuation is facilitated by star-
ting machining at the bottom of the
hole and machining outwards.
Use the best choice of right- or left-han-
ded insert to direct chips especially in
roughing.
1
2
3
1
2
1
3
Facegrooving
Internal grooving
1
3
2
Different methods of making wide face grooves.
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Turning and profilingModern parting and grooving tool sys-
tems can also perform turning opera-
tions for which there are dedicated insert
geometries. The stability of the CoroCut
system provides it with the capability
of machining at high cutting data even
when exposed to the radial forces during
axial turning.
When profiling of various shapes is re-
quired, the CoroCut systems offers
scope for rationalization since one tool
can be used to replace right-hand and
left-hand conventional tools. The round-
shape inserts have dedicated geome-
tries for these operations, for instance
RM for medium feed rates and tougher
machining conditions; RO for stainless
steel and sticky workpiece materials and
AM, which is a sharp, positive profiling
geometry for non-ferrous materials such
as aluminium. RE is recommended for
hard hard steels and RS for finishing
non-ferrous materials. The CoroCut sys-
tem offers unique stability with the railseat design and the Wiper effect good
surface finish.
Tool deflection always occurs to some
extent and some compensation may be
necessary for the difference in diameter
machined. The difference should be esta-
blished and the tool drawn back so that
the correct diameter can be machined.
The adjoining diagram illustrates this pro-
cess.
A screw-clamp toolholder should be se-
lected for turning and profiling operations
in view of achieving maximum stability. ACoroCut or Q-Cut tool with the shortest
possible tool accessibility (ar) should be
applied (for Q-Cut holder type 22). If for
reasons of accessiblity this is not pos-
sible, apply a holder with a longer dimen-
sion (for Q-Cut holder type 23) with cut-
ting data reduced accordingly.
A neutral CoroCut tool is suitable for
both opening up or completing a recess,
however, when machining with conven-
tional tools a right- and left-hand tool isrequired to achieve the same result.
In-copying is recommended to improve
chip control, minimize tool wear and to eli-
minate the tendency of the insert working
loose. To achieve perpendicular groove or
recess walls, radial plunging should be
carried out at each end, not one plunge
followed by turning and out-feeding.
Profile turning
Compensation on workpiece diameter.
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When it comes to roughing, limiting de-
flection is often an issue. Forces on the
insert should therefore be reduced prior
to changing direction of cut according to
the following sequence :
1. Infeed radially to the required depth of
cut (ap max 0.75 times insert width)2. Retract radially 0.1 mm
3. Turn axially to opposite shoulder
position
4. Retract diagonally 0.5 mm to outside
the component
5. Feed axially to the end position (still
0.5 mm off the machined diameter)
6. Infeed radially to the required depth
of cut.
Retract radially 0.1 mm and continue the
sequence for subsequent roughing pas-
ses.
Turn axially in both directions to use both
corners of the insert and to maximize
tool-life.
The machining of a wide groove can be
performed using one tool, where two con-
ventional tools might be needed. Care
should then be taken when machining the
bottom radius or chamfer. As the insert
contours the radius, most of the move-ment will be in the z-direction, which gene-
rates a thin chip at the front cutting edge.
This may lead to rubbing between tool and
component, rather than just cutting, and
consequently more wear and vibration
tendencies. Following the right sequence
will help to prevent this from occurring.
(See under finishing wide grooves).
When machining wide, shallow grooves
internally, the most suitable method is
to plunge turn. However, chip evacuation
needs attention, making sure that chips
are removed out of the hole and not jam-
med in the machining process. Chips
will always flow in the same direction as
the feed and it is therefore recommen-
ded that the direction of feed is always
towards the hole opening.
For shallow grooving with 166.0 toolhol-
der, it is important that a shim giving an
inclination angle of zero degrees is used
in the toolholder. For machining small
holes with toolholders not having shims,grooving bars 154.0 should be used.
to recommended levels should be used
to ensure the best cutting action.
If a sufficiently high feed is used with a
small D O C (or low feed and large D O C),
sufficient deflection of the tool will take
place to provide the insert with the clea-
rance needed at the front cutting edge.But if both feed and D O C are below
recommended values, insert clearance
may be insufficient and rubbing take
place between insert and machined sur-
face, giving rise to vibration tendencies
and poor surface finish.
A solution, therfore, may be to use insert
geoemtry TF, having a concave cutting
edge, which will minimize the contact
between insert and workpiece. Insert
geometries TF (lower feed), TM (higher
feed) and GF are designed to be used for
axial turning.
When plunging into or profiling corners
with round inserts, a phenomenon known
as wrap around is a problem that may oc-
cur. A large part of the cutting edge is en-
gaged in cut which leads to considerable
pressure on the insert. If the feed rate
is reduced excessively, however, vibration
tendencies are generated. The problem
is usually solved by applying the smallest
possible insert radius in relation to the ra-dius to be machined on the component.
A good starting point is for the feed rate
when plunging into the radius to be 50%
of that applied for the axial cut. If the in-
sert radius has to be the same as that
of the workpiece, introduce micro-stops
(dwelling) which shortens chip length and
breaks any vibration tendencies.
fn1= parallel cuts - max. chip thichness 0.15-0.40 mm
fn2= radius plunging - 50% max. chip thickness
Solving wrap around effect in plunging.
Rough turning a wide groove.
Turning corners with round inserts.
Right-hand inserts can be used in right-
hand external and left-hand internal tool-
holders. Left-hand inserts can be used
in left-hand external and right-hand inter-
nal toolholders.
When it comes to axial turning with
CoroCut tools, the Wiper effect makes it
posible to generate a high surface finish
(Ra values smaller than 0.5 microns can
be achieved along with high bearing rati-
os). High feed rates and D O C according
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How to choose your tool
Define the type of operation and system to use
Identify the operation:
Parting External or internal grooving, face grooving, shallow
grooving
External or internal turning
Undercutting, profiling and choosing the most suitable
system for it.
(See Tool selection for par ting and grooving tools)
Select the insert geometry and grade
Choose the insert geometry and grade.
Choose your insert size on the corresponding ordering
page.
(See Insert geometries and grades)
Select the tooling system and type of holder
Choose Coromant Capto or shank tool, depending on
clamping possibilities in turret/spindle.
Choose the right holder size on the corresponding
ordering page.
The insert seat must correspond to the size of the insert.
(See Selecting toolholder types)
Selecting tools for Parting and Grooving
Select cutting data
Find the recommended feed for selected insert chosen.
Choose the recommended cutting speed.
(See speed and feed recommendations for parting and
grooving geometries)
Tooling alternatives for Parting and Grooving
Coromant Capto integrated multi-taskmachines
Conventional turrets
Shanktool
Internal
Steelshan
kboring
bar
andCo
ro-
mantC
aptoad
aptor
Cutting
headwith
bar
inste
el,
carbid
ereinforced
ortun
ed
Steel
sha
nkborin
gba
r
CoromantCaptounit
External
Blade
When parting and grooving the inserts are often fed deep into
the material, which sets high demands on accessibility. This
means that the tools used are generally narrow and therefore the
length of the tool increases as the diameter increases. Tools and
tooling systems with high stability is therefore important.
1
2
3
4
CoroCut XS
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B
C
D
E
F
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CoroCut2-edge:
Cutting depths up to
20 mm
T-MAX Q-Cut (151.2):
Cutting depths above
20 mm
CoroCut 3 shallow cutting
depths -6.4mm
CoroCut2-edge:
Cutting depths up to
20 mm
T-MAX Q-Cut (151.3):
Min bore 20 mm
CoroCut2-edge:
Min bore 25 mm
T-MAX Q-Cut (151.2):
Min bore 32 mm
T-MAX U-Lock:
Min bore 12 mm
T-MAX Q-Cut (151.3):
First cut diameter from
24 mm
CoroCut2-edge:
First cut diameter from
34 mm
Parting External grooving Internal grooving Face groovingChoice of tool holder
First choice
Alternative tools CoroCut1-edge:
Cutting depths above
20 mm
CoroCut1-edge:
Cutting depths above
20 mm
Tool system
CoroCut2-edge:
Cutting depths up to
20 mm
CoroCut1-edge:
Cutting depths above
20 mm
CoroCut2-edge:
Cutting depths up to
20 mm
CoroCut1-edge:
Cutting depths above
20 mm
CoroCut2-edge
T-MAX U-Lock:
For circlip grooves
T-MAX Q-Cut (151.2)
T-MAX Q-Cut (151.3)
Min. bore 20 mm
CoroCut1- and
2-edge:
Min. bore 25 mm
T-MAX Q-Cut (151.2)
External turning Internal turning Undercutting Profiling Shallow grooving
T-MAX Q-Cut (151.2) T-MAX Q-Cut (151.2)T-MAX Q-Cut (151.2)
Min. bore 32 mm
Tool selection for parting and grooving tools
T-MAX Q-Cut (151.2):
Cutting depths above
20 mm
CoroCut 2-edge
shallow grooves
Grooving and turning as well as profiling with CoroCut tools.
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B 15
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A
B
C
D
E
F
G
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CoroCut 1- and 2-edge toolholders
F123 F123 F123 F123-S F123 F123 AG123 AX123 F123
X123 G123 G123
short long
Parting
Grooving
Face grooving
Undercutting
Profiling
Aluminium profiling
Turning
Bars
Tubes
Precision
Deep
Grooving
TurningProfiling
= Alternative tool= Recommended tool
1555 816 1232 1017 4-25 3.58.0 4.5-13 12-28Max. ar., mm
Internal
Spring/screw Screw Screw Screw Screw Screw Screw Screw ScrewClamping system
Selecting toolholder types
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B
C
D
E
F
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T-MAX Q-Cut toolholders
151.2 151.20 151.21 F151.22 F151.23 S151.22 AG151.22 AG551.31 F151.37 AF151.37 F151.42
AG151.32 0,90 151.21
35-100 13-45 15-32 816 1532 - 3.512 3.519.5 8.720 5.315 18
short long
= Alternative tool= Recommended tool
Spring/screw Spring Spring Screw Screw Screw Screw Spring Screw Screw Screw
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Turning
A
B
C
D
E
F
G
H
R = right hand holder
L = left hand holder
A = A-curved
B = B-curved
90
L
A
0
B A B
L
LR
B
90
R
AR
A
0
L
R
B
CoroCut family toolholders
There is a wide range of tool holders in the CoroCut family, both
Coromant Capto cutting units and conventional shank holders,
and blades for parting. One advantage with the CoroCut family
system is the good accessibility. In many cases one CoroCut
holder can replace two or more conventional turning holders
thus increasing the productivity.
The insert seat size of the holder should correspond with the
seat size on the insert; every holder can take all the different
insert geometries available.
0, 7, 45 and 70 shank style screw clamp holders for different applications
Spring clamp blades and shank for parting
Bars and cutting head for internal applications
Choosing the right holder for face groovingThe adjoining diagram indicates the right type of tool for diffe-rent face grooving applications.
CoroCut and Q-Cut external holders for face grooving are availa-
ble in B-curved design as stocked item. A-curved design can be
ordered as Tailor Made.
0 and 90 screw clamp holders and 0 bars for face grooving
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B
C
D
E
F
G
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Face grooving
blades
CoroCut SL blades CoroTurn SL adaptors
Neutral
Right hand Left hand
CoromantCapto 0
CoromantCapto 45
Shank 0
T-Max Q-Cut SL151.2
CoroCut SL123
CoromantCapto 0
CoromantCapto 45
Shank 0
T-Max Q-CutSL 151.2
CoroCutSL 123
Right hand Left hand
CoroCut SL blades
Face grooving
blades
CoromantCapto 90
CoromantCapto 90
Shank 90
CoroCut SL blades
CoroCut SL blades
Neutral
Right hand
Coromant
Capto 90
Coromant
Capto 90
T-Max Q-CutSL 151.3
CoroCut SL123
Coromant
Capto 90
Boring bar
90
Left hand
Left hand
CoroCut SL blades
Right hand
CoroCut SL123
T-Max Q-Cut SL151.3
Existing 570-cuttingheads
CoroTurn SL
Adaptors
Existing 570 bars CoroTurn SL
CoroCut SL - external machining
CoroCut SL - internal machining
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Recommendations when choosing CoroCut SL cutting blades
CoroCut SL cutting blades with a screw
clamp design, should be the first choice
for all types of grooving and parting ope-
rations. By using CoroCut 1-2 edge solu-
tion there is access to insert geometries
and grades for all types of operationsand work piece materials.
T-Max Q-Cut SL 151.2 system with a
spring clamp design, is a good choice for
deep grooving and parting operations.
570-25R.. C?-570-25-LF
570-32R.. C?-570-32-LF
570-40R.. C?-570-40-LF
570-25L.. C?-570-25-RF570-32L.. C?-570-32-RF
570-40L.. C?-570-40-RF
570-25L.. C?-570-25-LX-045
570-32L.. C?-570-32-LX-045
570-25R.. C?-570-25-RX-045
570-32R.. C?-570-32-RX-045
T-Max Q-Cut SL 151.3 system with its
new screw clamp design is an option for
internal operations especially in small
bores.
Combination of Cutting blade and Adaptor:
Parting, grooving, profiling, turning
CoroCut -SL123
Parting
Grooving
Profiling
Turning
Normal
Deep
GroovingProfiling
Min. internal diameter, mm
Max. ar, mm
Internal
Screw clamp Spring clamp Screw clampClamping system
Coupling diameter, mm
Insert width,mm
Q-Cut -SL151.2
Q-Cut -SL151.3
25. 32. 40 25. 32. 40 25. 32. 40
12 23 20 35 6 13
1.5 7.14 2.0 8.0 2.0 8.0
115 175 35.8 51.6
Face grooving
Screw clamp Screw clamp
CoroCut -SL123
Q-Cut -SL151.3
32
12 18
2.5 6.0
40 4001)
Face grooving
32
8.7 10.7
2.5 5.0
24 701)
1)First cut
diameter- min. max.
Alternative tool
Recommendedtool
=
=
Notrecommended
=
R
R
R
LL
L
L
L
R
R
Adaptor BladeCombina-tion
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B
C
D
E
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Cutting depth limitation for re-inforced CoroCut blades
Due to re-inforcement of the blade the max. cutting depth is
dependent on the work piece diameter. See adjoining diagram.
Work piece diameter, mm
Max. cutting depth
ar
Work piece diameter, mm
Max. cutting depth
ar
Screw clamp blades
Dm
300
250
200
150
100
50
5 10 15 20 25 32
R/L123E25-25B1R/L123F25-25B1R/L123G25-25B1
R/L123H25-25B1
300
250
200
150
100
50
Dm
N123D15-21A2N123E15-21A2
5 10 15
Spring clamp blades
Shallow grooving holder for face grooving
Insert seatsize
First cutdiameter, mm
Max cuttingdepth, mm
Min Max
100 3.5 83 3.5 57 3.5
46 4.5 46 4.5
46 4.5
min.
max.
First cut diameters
123 -GM, -TF, -CM
-RM, -TM
Holder
seat
size
G E
F
G
K H
J
K
Select correct width, geometry and system for parting of
< 8 1 CM/CS CoroCut3 0.05 812 1.5 CM CoroCut 2&3 0.07
1216 2 CM CoroCut 2 0.08
1624 2.5 CR CoroCut 2 0.08
2432 3 CR CoroCut 2 0.12
3240 4 CR CoroCut 2 0.15
4048 5 4E T-Max Q-Cut 0.18
4856 6 4E T-Max Q-Cut 0.20
Componentdia, mm
Insert width,la, mm
Insertgeometry
Toolsystem
Feedstart value,mm/r
Parting of bars
< 4 1 CM/CS CoroCut3 0.05 4 6 1.5 CM CoroCut 2&3 0.07
6 8 2 CM CoroCut 2 0.08
812 2.5 CR CoroCut 2 0.08
1216 3 CR CoroCut 2 0.12
1620 4 CR CoroCut 2 0.15
2024 5 4E T-Max Q-Cut 0.18
2428 6 4E T-Max Q-Cut 0.20
Insert width,la, mm
Insertgeometry
Toolsystem
Feedstart value,mm/r
Componentwall thick-ness, mm
Parting of tubes
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Parting and grooving insert geometries and grades
ApplicationLow feed Medium feed High feed Optimizing
CoroCut2
CoroCut2
CoroCut2
CoroCut2
Q-Cut151.2
Q-Cut151.2
Q-Cut151.2
Q-Cut151.2
CF 7E
CM 5E CR 4E 9E
TF 7G TM 5T 4T
RM 5P RO 4P
GF 4G GM 5G 6G
RS F-P AM 151.4AL
4U
RE E-P
GE E-G
TF CM151.37G
RM 151.37P
1) 151.34G
1) 151.37G
1) 1) 151.37P
5F
1)Internal machining with CoroCut inserts
CoroCut3
CM
CS
CSCM 5E 9E
Partingbars
tubes
Turning
Profiling
Grooving
Al profiling
Undercutting
Face grooving
Internal
GradesThe CoroCut family has different carbide
grades to cover all types of workpiece ma-
terials from the very wear resistant grade
GC3115 to the toughest grade on the mar-
ket GC2145. Cubic Boron Nitride and Dia-
mond tipped inserts are also available.
ISO P = Steel
ISOM = Stainless steel
ISO K = Cast iron
ISO N = Aluminum and non-ferrous
materialsISO S = Heat resistant super alloys
ISO H = Hardened materials
GC
2145
GC
2145
Wearresistance
Tough
ness
Conditions
Unstable
Stable
GC
2145
GC4025
GC3115
GC2135
ISO-P ISO-K
GC2135
ISO-M ISO-S ISO-H
GC3115
GC4025
CD10
H10
H13A
ISO-N
H13A
GC1005
GC2135
CB20
GC4125
GC4125
GC4125
GC4125
S05F
Geometries
CF 7E
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B
C
D
E
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Surface finish in axial turningWhen using geometries -TF or -TM in axial turning operations,
the wiper effect will generate much better surface finish (A)
compared to conventional tools (B). This wiper effect, genera-
ted by tilting the insert, makes it possible to increase the feed,
which results in a productivity increase.
Results from surface finish measurements from axial turning
in steel with geometries -TF and -TM are shown in the graphs
below. A
The Wiper effect with CoroCut
CoroCut -TF CoroCut -TM
Surface finish in parting and groovingThe Wiper is designed to work with radial feed (axial feed when
facegrooving). The main benefit is much better surface finish
on the component (see graph below). The CoroCut 1 -2 edge
system is a system for high pruductivity parting and grooving
operations. The CoroCut insert geometries -CF and -TF, as well
as the T-MAX Q-Cut geometries -7E and -7G, are using the Wiper
technology giving much better better surface finish in partingand single groove operations.
insert with Wiper technology
r= 0.4 mm
insert without Wiper technology
r= 0.4 mm
= Wiper effect
Cutting depth, ap: 1.5 mm
Material: Steel, CMC 01.2
Ra, m
Surface finish
-TF. Corner radius 0.4 mm.
Conventional tool.
Corner radius 0.4 mm.
Feed (fn) mm/rev
0 0.1 0.15 0.2 0.25 0.3
2.5
2
1.5
1
0.5
0
Cutting depth, ap: 1.5 mm
Material: Steel, CMC 01.2
Ra, m
Surface finish
-TM. Corner radius 0.8 mm.
Conventional tool.
Corner radius 0.8 mm.
Feed (fn) mm/rev
0 0.1 0.15 0.2 0.25 0.3
2.5
2
1.5
1
0.5
0
1.2
1.0
0.8
0.6
0.4
0.2
0.05 0.1 0.15 0.2
Ra, m
Surface finish
Feed (fn) mm/rev
B
ZvR
maxR
maxap ap
fn fn
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Grade GC3115
Based on a hard substrate, MT-CVD coated with TiCN-Al2O3 layer.
A high wear resistant grade for grooving and turning applications
under stable conditions. Also effective in hard steels. High cutting
speeds.
Grade GC4025 first choice for cast iron
Based on a hard gradient sintered substrate, MT-CVD coated with
TiCN-Al2O3-TiN layer. An all-round grade for ISO-P and ISO-K with
excellent combination of high wear resistance and good edge se-
curity. To be used in grooving, turning and parting-off operations
under stable conditions. Medium to high cutting speeds.
Grade GC4125 first choice for steel
A fine grained substrate, PVD-coated with TiAlN layer. An excellent
all-round grade in all ISO-areas. First choice for parting-off tubes,
grooving and turning operations and works well in low-carbon and
other smearing materials. Low to medium cutting speeds.
Grade GC2135 first choice for stainless steel
A MT-CVD-coated grade with TiCN-Al2O3-TiN layer. A grade for
toughness demanding operations such as parting-off to centre
and interrupted cuts. Low to medium cutting speeds.
Grade GC2145
The markets toughest substrate, PVD coated with TiAlN layer.
For extremely toughness demanding operations, such as inter-
rupted cuts and parting-off to centre. Low cutting speeds.
Grade H13A first choice for non-ferrous materials
Uncoated carbide grade. Good wear resistance and toughness
combined with edge sharpness. To be used in non-ferrous and
titanium materials.
Grade H10
Uncoated carbide grade. Good edge sharpness for use in alumi-
nium alloys and Heat Resistant Super Alloys (HRSA).
Grade GC1005 first choice for HRSA
A fine grained carbide substrate, PVD coated with TiN-TiAlN layer.
A wear resistant grade combined with sharp edges. To be used
for finishing with close tolerances in HRSA and stainless steel.
Grade S05F
MT-CVD-coated TiCN-Al2O3-TiN layer with a fine grained carbide
substrate. For roughing to finishing in HRSA-materials.
Grade CD10 first choice for finishing aluminium
A polycrystalline diamond (PCD) grade. An extremely wear resis-
tant grade giving very good surface finish. To be used only for
non-ferrous materials.
Grade CB20 first choice for hardened materials
A cubic boron nitride (CBN) grade. A wear resistant grade. To
be used for machining of hardened materials, with limited feed
and depth of cut. Eliminates grinding operations.
Parting and grooving grades
2135 4125
2145 2135
4125 4025
4125 4025
2135 4125
4025 3115
4125 4025
2135 4125
4025 3115
H13A H10
H13A 1005
Security Productivity
Parting off
Bars
Tubes
Turning
4125 40254125 1005
4125 4025
H13A CD10
1005 S05F
CB20
4125 4025
4125 1005
4125 3115
H13A
4125 1005
CB20
Profiling
Grooving
H10 CD10
235 H13A
4125 4025
2135 41254025 3115
H13A
H13A 1005
CB20
Aluminium
profiling
Undercutting
Face
grooving
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B
C
D
E
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-CR
Parting
-CF
Feed (fn), mm/r
4.0
3.0
2.5
0.05 0.1 0.2 0.3 0.4
Feed (fn), mm/r
6.0
5.0
4.0
3.0
2.5
0.05 0.1 0.2 0.3 0.4
Feed (fn), mm/r
5.0
4.0
3.0
2.5
2.0
0.05 0.1 0.2 0.3 0.4
-CM
Insert width (la), mm
Radial feed
Insert width (la), mm
Radial feed
Insert width (la), mm
Radial feed
Rough machiningStrong cutting edges, reduce risk of edge fractures.Suitable for parting off bars and interrupted cuts.For steel and cast iron, but also suitable for stainless steels when thereis a need for strong edges.
Available as CoroCut 1- and 2-edged inserts.
Parting off stainless steelsAlso recommended for thin walled tubes and small diameter compo-nents in all materials.The positive geometry eliminates the risk of built up edges.Low cutting forces resulting in reduced vibrations.
Available as CoroCut 1- and 2-edged inserts.
Stainless steels and sticky materialsVery good chip control at low feeds.The positive geometry eliminates the risk of built up edges.Gives soft cutting action.Generates good surface finish, due to wiper design on the side.
Available as CoroCut 2-edged inserts.
High feed choice
Low feed choice
Medium feed choice
WiperWiper
Feed recommendations for parting and grooving geometries
-CM
-CS
Radial feed
Insert width (la), mm
First choice for shallow parting and groovingFirst choice in most materialsSharp edge line, chip breaking geometryTo be used at normal cutting speeds 100 250 m/min
Radial feed
Insert width (la), mm
Feed (fn), mm/r
First choice for shallow parting and grooving at low speedsFor sticky materials and ball bearing materialsExtremely sharp edge line with an open chip formerTo be used in multi-spindle machines at low cutting speeds 50 m/min
To be used for non-ferrous materials at normal cutting speeds100 250 m/minRight (R) or left (L) hand inserts to bee used for pip and burr freemachining
Radial feed
Insert width (la), mm
-CS
Ideal solution for minimising pips and burrs on components thanksto the sharp cutting edge and front angles of 10 and 15.
Recommended for small components.
Suitable for free cutting steel.
Feed (fn), mm/r
Feed (fn), mm/r
= high cutting speed
= low cutting speed
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B
C
D
E
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G
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-GF Radial feed
Insert width (la), mm
Feed (fn), mm/r
Axial feed
Feed (fn), mm/r
Cutting depth (ap), mm
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35
4.0
3.0
2.0
1.0
0
8.0
6.0
4.0
3.0
2.0
la
For precision groovesGood accuracy and repeatability dueto tight tolerances on inserts.Low cutting forces and good surfacefinishing due to sharp cutting edge.Large number of different widths.Designed for side turning.
Available as CoroCut 1- and
2-edged inserts.
Low feed choice
-GM
Feed (fn), mm/r
6.0
5.0
4.0
3.02.0
0.05 0.1 0.2 0.3 0.4
Grooving
Insert width (la), mm
Radial feed Grooving in all materialsOutstanding chip control.Reduces chip width giving good surfaces.
Available as CoroCut 2-edged inserts.
Medium feed choice
Profiling
-RM
Feed (fn), mm/r
Insert width (la), mm
Radial feed Axial feed
Feed (fn), mm/r
Cutting depth (ap), mm
Excellent for profiling in all materialsOutstanding chip control even at lowfeeds and small depths of cut.Good surface finish.
Available as CoroCut 1 and 2-edgedinserts.
Medium feed choice
-GE Alternative for finish grooving of hardened materialsMaintains close tolerances and gives excellent finish on components.
Available as CoroCut 1-edged inserts.
Feed (fn), mm/r
Cubic Boron Nitride
tipped
Insert width (la), mm
Radial feed
8.0
6.0
5.0
4.0
3.0
0 0.05 0.1 0.15 0.2
Axial feed
Cutting depth (ap), mm
-RE
Cubic Boron Nitride
tipped
Alternative for finish profiling ofhardened materialsGives outstanding productivity andexceptional surface finish.
Available as CoroCut 1- edged inserts.
Insert width (la), mm
Radial feed
Feed (fn), mm/r
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
5
4
3
2
1
0
la
6.0
5.0
4.03.0
8.0
Feed (fn), mm/r
8.00
6.00
5.00
4.00
3.00
2.001.50
0 0.1 0.2 0.3 0.4
6.0
5.0
4.0
3.0
0.1 0.2 0.3 0.4 0.5
8.0 5
4
3
2
1
0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
la
6.0
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A
B
C
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Aluminium profiling
-AMRadial feed
Insert width (la), mm
Feed (fn), mm/r
Axial feed
Feed (fn), mm/r
Cutting depth (ap), mm
5
4
3
2
1
0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
la
8.0
WiperWiper
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B
C
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Parting
-4E Radial feed First choice for parting off barsStrong geometry ideal for interrupted cuts.For parting off steel and cast iron.
-5E Radial feed First choice for parting off tubesParticularly recommended for thin walled tubes and small dia-meter components in all materials.Generates low cutting forces and hence little vibration.For parting off stainless steel.
-5F Radial feed Optimizer to minimize pips and burrs on components due tosharp cutting edge, with a wide choice of front anglesRecommended for stainless steels, ductile and work hardeningmaterials.
-7E Radial feed Alternative for good chip control at low feedsSoft cutting action.Low cutting forces.
Generates good surface finish, due to Wiper design.Very good chip control.
-9E Optimizer for ball bearing operations and long chippingmaterialsGood chip control giving a high productive and problem-freeproduction.
High feed choice
Medium feed choice
Low feed choice
Feed (fn), mm/r
Insert width (la), mm
8.06.0
5.0
4.0
3.0
2.5
0 0.1 0.2 0.3 0.4 0.5
Feed (fn), mm/r
Insert width (la), mm
5.0
4.0 3.0
2.5
2.0
0 0.1 0.2 0.3 0.4 0.5
Feed (fn), mm/r
Insert width (la), mm
4.03.0
2.5
0 0.1 0.2 0.3 0.4 0.5
Radial feed
Insert width (la), mm
Feed (fn), mm/r
4.0
3.0
2.5
0 0.1 0.2
WiperWiper
Feed (fn), mm/r
Insert width (la), mm
0 0.1 0.2 0.3 0.4 0.5
6.05.04.03.02.5
2.0
-TM
Feed (fn), mm/r
Insert width (la), mm
Radial feed Axial feed
Feed (fn), mm/r
Cutting depth (ap), mm
General turning operationsThe positive geometry eliminates therisk of built up edges.
Available as CoroCut 2-edged inserts.
Medium feed choice
5
4
3
2
1
0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
la
6.0
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-5G
Grooving
Radial feed First choice for general purpose grooving.Outstanding chip control.Reduces chip width giving good surfaces.For grooving in all materials
-4G (N151.2) Radial feed Alternative choice for precision grooving.Good accuracy and repeatability due to tight tolerances oninsert.Low cutting forces and good chip control in a wide rangeof materials.Sharp cutting edge.
-4G (N151.3)
These inserts can only beused with holders typeF151.37 or bars type
AG151.32
Radial feed Alternative choice for internal grooving of smallest bores.
Good accuracy and repeatability due to tight tolerances oninsert.Low cutting forces and good chip control in a wide range ofmaterials.Sharp cutting edge.
-6G Radial feed Alternative choice when chip control is of prime importanceat high production rates.Particularly recommended for mass production operations, e.g.cam shaft production.
Alternative for finish grooving of hardened materials.Maintains close tolerances and gives excellent finish oncomponents.
E-G
Cubic Boron Nitride
tipped
Radial feed
Medium feed choice
Low feed choice
Low feed choice
High feed choice
Internal grooving
Feed (fn), mm/r
Insert width (la), mm
8.0
6.0
5.0
4.0
3.0 2.0
0 0.1 0.2 0.3 0.4 0.5
Feed (fn), mm/r
Insert width (la), mm
8.0
6.0
0 0.1 0.2 0.3 0.4 0.5
Feed (fn), mm/r
Insert width (la), mm
10.0
8.0
6.0
5.0
4.0
3.0 2.0
0 0.1 0.2 0.3 0.4 0.5
Feed (fn), mm/r
Insert width (la), mm
6.0
5.0
4.0
3.0
0 0.05 0.1 0.15 0.2 0.25
Feed (fn), mm/r
Insert width (la), mm
8.0
6.0
5.0
4.0
3.0
2.0
0 0.1 0.2 0.3 0.4 0.5
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(N151.3)-7G
Face grooving
= Axial feed, approx. range, mm/r, first cut
= Axial feed, approx. range, mm/r, opening cut
These inserts can only beused with holders typeF151.37 or bars type
AG151.32
Axial feed Radial feed
Insert width (la), mm
Feed (fn), mm/r
0.05 0.1 0.15 0.2 0.25 0.3
6.0
5.0
4.0
3.0
Feed (fn), mm/r
Cutting depth (ap), mm
5
4
3
2
1
0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
la
6.0
5.0
6.0
6.0
5.0
4.0
3.0
0 0.1 0.2 0.3
Insert width (la), mm5
4
3
2
1
0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Feed (fn), mm/r
Cutting depth (ap), mm
Feed (fn), mm/r
la
8.0
6.0
5.0
4.0
3.0
8.06.0
5.0
4.0
3.0
0 0.1 0.2 0.3 0.4
WiperWiper
Insert width (la), mm
Feed (fn), mm/r
Feed (fn), mm/r
Cutting depth (ap), mm
10.0
8.0
6.0
5.0
4.0
3.0
0 0.1 0.2 0.3 0.4
5
4
3
2
1
0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
la
10.0
8.0
6.0
5.0
4.0
3.0
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Radial feed Axial feed
Radial feed Axial feed
-AL
F-P
These insertscan only be usedwith holders typeF151.42
Diamond tipped
Profiling
First choice for profiling in non-ferrous materials.Good chip flow giving good surfacefinish.Extra long cutting head gives excellentaccessibility.
Gives unrivalled tool life and cuttingeconomy when using diamond coatedgrade CD1810.
Alternative for finish profiling ofnon-ferrous materials.Gives outstanding productivity andexceptional surface finish.For use under stable conditions.
Radial feed Axial feedE-P
Cubic Boron
Nitride tipped
Alternative for finish profiling ofhardened materials.Gives outstanding productivity andexceptional surface finish.
(N151.4)
Feed (fn), mm/r
Cutting depth (ap), mm
5
4
3
2
1
0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
la
6.0
5.0
4.0
Insert width (la), mm
Feed (fn), mm/r
6.0
5.0
4.0
0 0.1 0.2 0.3 0.4
Feed (fn), mm/r
Cutting depth (ap), mm
5
4
3
2
1
0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
5.0
4.0
la
3.0
6.0
Insert width (la), mm
Feed (fn), mm/r
6.0
5.0
4.03.0
0 0.05 0.1 0.15 0.2
Feed (fn), mm/r
Cutting depth (ap), mm
5
4
3
2
1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
la
8.0
6.0
Insert width (la), mm
Feed (fn), mm/r
8.0
6.0
0 0.1 0.2 0.3 0.4
Circlip grooving
R-/L154.0G
Feed (fn), mm/r
4.15
3.15
2.15
1.10
0 0.1 0.2 0.3
Insert width (la), mm
Radial feed Alternative for good economy when groovingcirclips.High productivity and reliability through low cuttingforces and little vibration.Three cutting edges give good economy.Recommended for use in all materials.
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Turning
-5T
-4T
Radial feed Axial feed
Radial feed Axial feed
Feed (fn), mm/r
Cutting depth (ap), mm
5
4
3
2
1
0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
la
6.0
5.04.0
3.0
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ISO CMC
No
Material Hard-nessBrinell
Spe-cificcuttingforce k
c
0.4
P
M
N/mm2 HB
2000 1252100 1502180 170
2100 1802775 2752775 350
2500 2003750 325
1800 1802100 2002500 2253600 250
STEEL
Unalloyed01.101.201.3
02.102.202.2
03.1103.21
06.106.206.306.33
Low-alloy 5%
High-alloy >5%
Castings
C = 0.1 0.25%C = 0.25 0.55%C = 0.55 0.80%
Non-hardenedHardened and temperedHardened and tempered
UnalloyedLow-alloy (alloying elements 5 %)High-alloy, alloying elements >5%)Manganese steel, 1214% Mn
AnnealedHardened tool steel
05.1005.1105.1205.13
Bars/for
ged
Ferritic/martensitic
Free machining steelNon-hardenedPH-hardenedHardened
05.2005.2105.2205.23
Austenitic Free machining steelAusteniticPH-hardenedSuper austenitic
05.5105.52
Austenitic-ferritic(Duplex)
Non-weldableWeldable
0.05%C
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Feed fn, mm/r
Cutting speed vc, m/min
Feed fn, mm/r
Cutting speed vc, m/min
Feed fn, mm/r
Cutting speed vc, m/min
H13A
120 9090 7060 4070 50
0.05- 0.5
120 80100 6549 3365 44
75 60
50 38
70 4743 29
GC4025
325 175300 135280 120
0.05- 0.5
270 125260 95210 75
250 105185 70
160 65180 80100 7580 42
GC4125
175 75165 75130 60140 65
0.05- 0.5
205 85185 90130 60140 65
155 75130 60
150 70
125 55
160 80105 55
135 65110 55
H13A
0.05- 0.5
100 8570 55
80 6580 60
70 5560 44
GC4125
255 125230 100205 90
0.05- 0.5
205 95175 80140 65
180 80130 55
120 60140 75105 4560 35
GC2135
155 65145 65110 46120 50
0.05- 0.5
170 75165 70105 49115 55
135 60110 50
130 60
110 46
135 6090 44
115 5595 45
GC4025
0.05- 0.5
300 160220 100
260 125225 110
240 105190 90
GC2135
205 100180 75175 70
0.05- 0.5
175 80155 70125 55
155 70105 43
105 50120 6090 4050 29
GC235
170 130130 100
90 70100 75
0.05- 0.5
150 110125 95
75 5585 65
125 9595 70
110 85
70 55
105 8065 49
110 8585 60
GC4125
0.05- 0.5
220 110150 85
180 95150 80
160 85130 65
GC235
165 130150 120140 105
0.05- 0.5
140 110120 85
95 70
70 6045 33
100 7090 5580 47
100 80
GC2145
140 55130 50100 40110 45
0.05- 0.5
160 70140 5595 44
105 49
125 50100 45
120 47
100 40
125 5080 38
105 4780 39
GC2145
175 90160 65150 60
0.05- 0.5
155 75140 60115 49
140 6595 37
95 45110 5580 35
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N
ISO CMCNo
Material Hard-nessBrinell
Specificcuttingforce k
c
0.4
CD10
Feed fn, mm/r
Cutting speed vc, m/minN/mm
2 HB
The recommendations are valid for use with cutting fluid.
5400 60 HRC2750 400
04.110.1
Hardened and temperedCast or cast and aged
500 60
800 100
30.11
30.12
Aluminium alloys Wrought or wrought and coldworked, non ageing
Wrought or wrought and aged
750 75900 90
30.2130.22
Aluminium alloys Cast, non ageingCast or cast and aged
700 110700 90
1750 100
33.133.2
33.3
Copper andcopper alloys
Free cutting alloys, 1% PbBrass, leaded bronzes, 1% Pb
Bronze and non-leadad copper incl. electrolyticcopper
20.1120.12
Iron base Annealed or solution treatedAged or solution treated and aged
Nickel base20.2120.22
20.24
Annealed or solution treatedAged or solution treated and aged
Cast or cast and aged
20.31
20.32
20.33
Cobalt base Annealed or solution treated
Solution treated and aged
Cast or cast and agedHeatresista
nt
superalloy
s
Titanium
Titanium Commercialpure1)
(99.5% Ti)23.1
23.2123.22
, near and +alloys, annealed +alloysin aged cond, alloys, annealed or aged
Titanium alloys1)
Rm2)
3000 2003100 280
3320 2503600 350
3700 320
3300 200
3750 300
3800 320
1530 400
1675 9501690 1050
S
H
1) Positive cutting geometry and coolant should be used.2) Rm = ultimate tensile strength measured in MPa.
ISO CMCNo
Material Hard-nessBrinell
Specificcuttingforce k
c
0.4
ISO CMCNo
Material Hard-nessBrinell
Specificcuttingforce k
c
0.4
N/mm2 HB
N/mm2 HB
Feed fn, mm/r
Cutting speed vc, m/min
Feed fn, mm/r
Cutting speed vc, m/min
Hardenedmaterial
Non-ferrous
material
0.05- 0.5
2000 465
2000 465
2000 4652000 465
800 325795 325
400 185
H10
0.05- 0.3
190 160
80 6570 55
CB20
0.05- 0.1
130 125200 195
Note! For internal grooving, facegroving and undercutting the speed shouuld be reduced by 30-40 %.
CD1810
0.05- 0.5
2500 150
2500 150
2500 1502500 150
800 150800 150
400 150
GC1005
0.05- 0.3
180 120150 100
90 55 80 50
70 46
90 60
80 50
70 46
CC670
0.05- 0.1
110 100110 100
H10
0.05- 0.5
2400 715
805 275
825 275510 200
S05F
0.05- 0.3
200 130 165 110
100 60 90 55
80 50
100 65
90 55
80 50
Extra hard steelChilled
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H13A
0.05- 0.5
995 585
420 235
995 585650 360
300 175200 115
150 90
H13A
0.05- 0.3
50 37 40 26
30 23 20 13
20 13
35 2723 1520 13
175 145
70 6065 55
GC4125
0.05- 0.3
70 38 50 29
45 28 40 22
30 16
50 3340 2230 16
200 95
70 3865 33
GC2135
0.05- 0.3
50 29 40 26
40 2635 21
25 10
45 2835 1725 14
GC235
0.05- 0.3
50 37 40 26
30 2320 13
20 13
35 2723 1520 13
GC2145
0.05- 0.3
40 30 30 20
25 2015 10
15 10
30 2020 1015 10
CC670
0.05- 0.1
600 500500 400
250 200
410 340350 300320 250
Feed fn, mm/r
Cutting speed vc, m/min
Feed fn, mm/r
Cutting speed vc, m/min
Feed fn, mm/r
Cutting speed vc, m/min
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H
Application hints for parting and grooving
GeneralInsert clamping in toolholderThe CoroCut family has two different in-
sert clamping systems.
CoroCut in insert seat size D-G and all
Q-Cut insert seat sizes have a V-shaped
design giving a very secure clamping for
parting and grooving applications. (1)
CoroCut in insert seat size H-L has a
unique rail-design giving stability to the
insert clamping. This is primarily need-
ed in operations generating side forces
such as turning and profiling. (2)
The recommended torque values for the
clamping screws are shown in tool tables
and should be used without overtighten-
ing. (The maximum torque is about 50%
higher than the table values.)
Mounting the insert: in CoroCut spring
clamp blade key
1. Mount the excentric key in the corre-
sponding recess of the blade slot.
2. Open the tip seat (lift the key) as you
push the insert into the pocket.
Removing the insert:
1. Mount the excentric key in the corre-
sponding recess of the blade slot.
2. Open the tip seat (lift the key) as you
pull the insert from the pocket.
Q-Cut spring clampAlways apply a little cutting fluid or oil on
the insert seat before mounting to fur-
ther increase the holder life.
Use the special Q-Cut key for inserting
and extracting the insert in order to aviod
edge fractures.
No pivot holes are provided in either the
570 type exchangeable cutting heads
(R/LAG 551.31) or the smaller MBS bla-
des for parting or face grooving. For the-
se items a small rubber hammer should
be used to tap the insert into its finalposition. The tip of the yellow key should
be used to extract the insert.
Toolholder selectionTo minimize the risk of vibration tenden-
cies and tool deflection, always choose :
- a blade or toolholder with the smallest
tool overhang
- maximum toolholder shank dimension
- blade height (h) equal to or larger than
the blade insertion length
- blade or holder with maximum blade
width (largest possible insert seat size)
- use a CoroCut toolholder with short ar
(for Q-Cut holder type 22) if possible to
ensure good stability and straight cuts.
The reinforced holder will increase stabil-
ity further.
Mounting the toolholderMake sure the toolholder is mounted at
90 degrees to the centre-line of the work-
piece so as to obtain perpendiculasr sur-
faces in the cut and reduce the risk of
vibration tendencies.
Make sure the toolholder is mounted with-
in plus/minus 0.1 mm especially when
parting of bars and grooving components
having small diameters. This affects cut-ting forces and the pip formation.
Cutting fluidA copious supply of cutting fluid, directed
exactly at the cutting edge, should be
used while the insert is engaged and
throughout the operation.
For tool blocks a coolant adapter can be
mounted and the coolant supply connected
from above or from either side. The adapter
can be ordered as an optional extra and is
supplied with an assembly screw.
Parting offOptimize tool-life .. by reducing the feed rate by up to
75% about 2 mm before the component
is parted off.
Select width, geometry and toolsystem for parting off (B20)
2 1
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D
E
F
G
H
Pips and burr minimization .. Can be achieved by using ground
right or left-handed inserts (for example
geometry G For GS) with the smallest
possible front angle that gives an accep-
table component.
Tools for large depths ofpenetrationUse double ended blades for best insert
seat economy and accessibility at large
depths of penetration.
Note that when machining a large diam-
eter workpiece or using a holder/blade
with large overhang reduce feed and cut-
ting speed when parting to the centre, in
order to minimize pip and load on the
cutting edge.
GroovingFinish grooving .. can be improved by the use Wiper
technology to achieve good surface finish
in grooves and parting (geometries CF
and TF as well as 7E and 7G)
Chamfered grooves .. can be produced with a standard GF
insert which machines the groove and
chamfers. This can be optimized with a
Tailor Made insert incorporating cutting
edges for producing chamfers specifical-
ly for reducing cycle times in large vol-
ume production.
Internal grooving .. should have the shortest possible tool
overhang and the lightest cutting geometry
(GF or TF). Make several insertions with a
narrower insert followed by a finishing cut
or a single insertion followed by plunge
turning. Start at the bottom of the hole
and work outwards and use RH or LH in-
serts to direct chips when roughing. Use
large amounts of cutting fluid. Consider
EasyFix sleeeves to optimize set-up and
achieve good bar clamping.
Tool rubbing in facegrooving .. make sure that the tool is right for
the diameter range, parallel to the axis
of rotation and correct in relation to the
centre-line may need lowering or rais-
ing depending upon where rubbing takes
place (inner or outer).
See Face grooving.
For shallow grooving .. it is very important that a zero degree
angle of inclination is used. For small
bores when using toolholders without
shims grooving a bar type 154.0 must
be used. The RH insert can be used for
RH external and LH internal toolholders.
The LH inserts for LH external and RHinternal toolholders.
TurningFinishing wider grooves ...... with an axial turning operation with geo-
metries TF or TM will provide the Wiper ef-
fect for achieving good surface finish com-
pared to conventional turning tools.
Compensation when axialturningDuring axial turning or copying the tool is
subjected to a small deflection, caused
by axial cutting forces. This results in a
difference (Dc/2) in diameter during
the transition between radial and axial
feed. In order to compensate for this, the
difference in diameter should be meas-
ured and the tool drawn back so that the
correct diameter is obtained.
WiperWiper
0
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D
E
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G
H
It is important to detect if the grade is too wear resistant
(hard) or too tough (soft), by inspecting the edge line behav -
iour. Edge line having early plastic deformation (PD) indicates
the grade is too tough and a more wear resistant grade
should be used. Edge line having early chipping (small car -
bide pieces broken out of edge line) indicates that the grade
is too wear resistant and a tougher grade should be used.
Plastic deformation. Chipping.
Cause
? Cutting edge
temperature too low.
? Unsuitable geometry
or grade.
Solution
? Increase cutting speed
and/or feed.
? Choo se a geometry
with a sharper edge .
Preferably a PVD
coated grade.
Built-up edge (BUE)
When parting to centre and in stainless material its almost
impossible to avoid BUE. Its important to minimise this
phenomenon by using the solutions above.
Cause
? Excessive temperature
in cutting zone.
? Unsuitable grade.
? Lack of coolant supply.
Solution
? Reduce cutting speed
and/or feed.
? Choose more wear
resistant grade.
? Improve coolant supply.
Plastic deformation (PD)
Cause
? Cutting speed too high .
? Too soft grade.
? Lack of coolant
supply.
Solution
? Decrease cutting
speed .
? Choose more wear
resistant grade .
? Improve coolant supply.
Excessive flank wear
Cause
? Too hard grade .
? Too weak geometry .
? Unstable conditions .
? Too high cutting data .
Solution
? Choose a softer grade .
? Choose a geometry for
higher feed area .
? Reduce overhang . Check
centre height.? Re duce cutting data.
Chipping/breakage
Cause
? Oxidation at the cutting
depth.
? Too high edge
temperature .
Solution
? Use varying cutting
depths.
? Re duce cutting speed .
? Improve coolant flow.
Notch wear
Cause
? Cutting speed too high .
? Too soft grade.
? F eed too high .
? Lack of coolant supply.
Solution
? Decrease cutting
speed .
? Choose more wear
resistant grade .
? Decrease feed .
? Improve coolant supply.
Crater wear
Finish TurningCare should be taken when machining
around the bottom radius of the groove.
Follow the previously recommended ma -
chining sequence.
Rough turningTo achieve a flat bottom and high-quality
groove-sides, follow the previously rec -
ommended machining sequence.
Tool wear indicators
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CoroCut inserts Geometries FB, RO, GF, GE
Shapeoptions
Shapeoptions
OptionsInsert seat
size
No of edges
Insert grade
ER
Geometry = FB, RO, GF, GE and insert seat
size = D,E, F, G, H, J, K, L
2 (1 for GE)
FB = GC4025, GC4125, H10F, H13A
RO = GC2135, GC4125, H10F, H13A, 1005, S05F
GF = GC2135, GC4125, GC1005, H13A, S05FGE = CB20, CB50
ER-treatmentS=small, L=Large or R=Recommended
A1, A2, A3
R1, R2, R3, R4
D1, D2, D3, D4
V1, V2, V3, V4
S3, S4, S5
Tolerance
Insert width1.98.0 mm
Insert radius R1/R2/R3/R4
lengthD1/D2/D3/D4
angleV1/V2/V3/V4
Clearance angleS3/S4/S5
A1Tolerance 0.02 mm
123-FB2 Edge
123-RO2 Edge
Shapeoptions
1 2 3 4 5
6 7 8 9 10
1211 16 17
Insert seat size
Insert width
123-GE G H J K L
123-FB E F G H J K L
123-RO E F - H J K L
123-GF E F G H J K L
123-FB 1.9-2.3 2.3-3.4 2.6-3.8 3.5-4.8 4.5-5.8 5.5-6.8 6.5-8.0
123-RO 1.9-2.4 2.8-3.2 - 3.8-4.0 5.5-6.35 6.4-7.4 7.4-8.0
4.5-5.0
123-GF 1.9-2.3 2.3-2.8 2.8-3.6 3.6-5.0 5.0-5.6 5.6-7.2 7.2-8.0
123-GE 3.0-3.4 4.0-5.0 4.5-6.35 5.6-6.35 6.5-8.0
Blankforsha
pe
option8.
123-GF2 Edge
Grooves are often designed in many different shapes and dimensions depending on its working area. With Tailor Made tools
you can increase the productivity and make it possible to generate grooves not possible to produce with standard tools. We
tailor inserts and toolholders to suit your specific component requirements.
Inserts
For inserts choose suitable shape option (see below) plus actual dimensions according to Turning tools catalogue. Contact
your Sandvik Coromant representative and we will give a quick quotation, competitive price and delivery.
123-GE1 Edge
For more GF-limits see table further on.
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H
1716
151.2-6G
12
8
4 5
6
8*
4*
5* 6 7
321*
151.2-4G
7
32
10 119
1
151.2-3G
1
Quick quotation
Easy to order
Competitive delivery
T-Max Q-Cut inserts Geometries 3G, 4G and 6G
Alternative when shapes required lie outside Tailor Made range of -4G.
Shapeoptions
Shapeoptions
Shapeoptions
For applications requiring optimal chip control in width
range 610 mm.
Shape
options
OptionsInsert seat 20. 25, 30, 40, 50, 60
size
Insert 3GGC4125, GC225, GC235, H13A, H10F, GC1020, GC1025
grade 4GGC4125, GC225, GC235, S10, S30, SM30, GC415
CT525, H10A, H13A, H10F, GC1020
6GGC4025, GC235
ER ER-treatmentS=small,L=Large orR=Recommended
Recommended first choice geometry for grooving. *Options 1, 4, 5 and 8 also suitable for T-Max Q-cutter.
The face of options 4 and 5 must be symmetrical for T-Max Q-cutter.
Shapeoptions
Shapeoptions
Note! For specific details regarding the options,
contact your Coromant sales representative.
A1, A2, A3 Insert width1.9-11.0 mm
R1, R2, R3, R4 Insert radius R1/R2/R3/R4
Insert radiusR1/R26G=0.2-2.0 mm
D1, D2, D3, D4 lengthD1/D2/D3/D4
V1, V2, V3, V4 angleV1/V2/V3/V4
Negative land T-Max Q-Cutter10
Tolerance A1Tolerance 0.02 mm
8/10/2019 B - Parting and Grooving
41/42
B 41
Turning
A
B
C
D
E
F
G
H
Face grooving
Shank holders Tool design
R
A
Copy angle
B
Blade type
Holder style
90
F
G
Reinforced blade
face grooving
Reinforced blade
parting
Turning Profiling
Clamping system
Screw
Spring
N
L
Coromant Capto
Radial groovingParting
CoroCut and T-MAX Q-Cut for parting and grooving Machininglimitations
Operation type
Standard inserts
Parting
Turning
Grooving
Profiling
Type
123
123
123
123
123
Geometries
CF, CM, CR
TF, TM
GM
RM
Insert sizes
E, F, G, H, J, K
G, H, J, K, L
E, G, H, J, K, L
F, G, H, J, L
Type
N151.2
N151.2
N151.2
N151.3
N151.2
Geometries
4E, 5E, 5F, 4U
4T, 5T, 4U
5E, 4G, 5G, 6G, 4U
7G
4P, 5P, 4U
20, 25, 30, 40, 50, 60, 80
30, 40, 50, 60, 80
20, 25, 30, 40, 50, 60, 80
20, 25, 30, 40, 50
30, 40, 50, 60, 80
Valid for all operation types
123 FB, RO, GF E, G, H, J, K, L N151.2
N151.2
3G, 4G
6G
20, 25, 30, 40, 50, 60, 80
60, 80
Insert sizes
For toolholders, choose the type of operation and holder according to the Turning tools catalogue. Contact your
Sandvik Coromant representative and we will give a quick quotation and competitive price and delivery.
8/10/2019 B - Parting