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Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size...

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www.toolmex.com Technical Reference for Cutting Tools
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Page 1: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Technical Reference for

Cutting Tools

Page 2: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

1075 Worcester Street, Natick, MA 01760-1589+1-508-653-8897 • 800-992-4766 • Fax +1-508-653-5110 • Email: [email protected]

Drill Size

Metric(mm)

Decimal Equivalent

– 0.10 .0039– 0.20 .0079– 0.25 .0098– 0.30 .011880 0.34 .013579 0.37 .0145

1/64 0.40 .015678 0.41 .016077 0.46 .0180– 0.50 .019776 0.51 .020075 0.53 .021074 0.57 .0225– 0.60 .023673 0.61 .024072 0.64 .025071 0.66 .0260– 0.70 .027670 0.71 .028069 0.74 .0292– 0.75 .029568 0.79 .0310

1/32 0.79 .0313– 0.80 .031567 0.81 .032066 0.84 .033065 0.89 .0350– 0.90 .035464 0.91 .036063 0.94 .037062 0.97 .038061 0.99 .0390– 1.00 .039460 1.02 .040059 1.04 .041058 1.07 .042057 1.09 .043056 1.18 .0465

3/64 1.19 .046955 1.32 .052054 1.40 .055053 1.51 .0595

1/16 1.59 .062552 1.61 .063551 1.70 .067050 1.78 .070049 1.85 .073048 1.93 .0760

5/64 1.98 .078147 1.99 .0785– 2.00 .078746 2.06 .0810

Drill Size

Metric(mm)

Decimal Equivalent

45 2.08 .082044 2.18 .086043 2.26 .089042 2.37 .0935

3/32 2.38 .093841 2.44 .096040 2.50 .98039 2.53 .099538 2.58 .101537 2.64 .104036 2.71 .1065

7/64 2.78 .109435 2.79 .110034 2.82 .111033 2.87 .113032 2.95 .1160– 3.00 .118131 3.05 .12001/8 3.18 .125030 3.26 .128529 3.45 .136028 3.57 .1405

9/64 3.57 .140627 3.66 .144026 3.73 .147025 3.80 .149524 3.86 .152023 3.91 .1540

5/32 3.97 .156222 3.99 .1570– 4.00 .157521 4.04 .159020 4.09 .161019 4.22 .166018 4.31 .1695

11/64 4.37 .171917 4.39 .173016 4.50 .177015 4.57 .180014 4.62 .182013 4.70 .1850

3/16 4.76 .187512 4.80 .189011 4.85 .191010 4.91 .19359 4.98 .1960– 5.00 .19688 5.05 .19907 5.11 .2010

13/64 5.16 .20316 5.18 .20405 5.22 .2055

Drill Size

Metric(mm)

Decimal Equivalent

4 5.31 .20903 5.41 .2130

7/32 5.56 .21882 5.61 .22101 5.79 .2280A 5.94 .2340

15/64 5.95 .2344– 6.00 .2362B 6.05 .2380C 6.15 .2420D 6.25 .2460

1/4 6.35 .2500E 6.35 .2500F 6.53 .2570G 6.63 .2610

17/64 6.75 .2656H 6.76 .2660I 6.91 .2720– 7.00 .2756J 7.04 .2770K 7.14 .2810

9/32 7.14 .2812L 7.37 .2900M 7.49 .2950

19/64 7.54 .2969N 7.67 .3020

5/16 7.94 .3125– 8.00 .3150O 8.03 .3160P 8.20 .3230

21/64 8.33 .3281Q 8.43 .3320R 8.61 .3390

11/32 8.73 .3438S 8.84 .3480– 9.00 .3543T 9.09 .3580

23/64 9.13 .3594U 9.35 .3680

3/8 9.53 .3750V 9.56 .3770W 9.80 .3860

25/64 9.92 .3906– 10.00 .3937X 10.08 .3970Y 10.26 .4040

13/32 10.32 .4062Z 10.49 .4130

27/64 10.72 .4219– 11.00 .4331

7/16 11.11 .437529/64 11.51 .4531

Drill Size

Metric(mm)

Decimal Equivalent

15/32 11.91 .4688– 12.00 .4724

31/64 12.30 .48441/2 12.70 .5000– 13.00 .5118

33/64 13.10 .515617/32 13.49 .531235/64 13.89 .5469

– 14.00 .55129/16 14.29 .5625

37/64 14.68 .5781– 15.00 .5906

19/32 15.08 .593839/64 15.48 .60945/8 15.88 .6250– 16.00 .6299

41/64 16.27 .640621/32 16.67 .6562

– 17.00 .669343/64 17.07 .671911/16 17.46 .687545/64 17.86 .7031

– 18.00 .708723/32 18.26 .718847/64 18.65 .7344

– 19.00 .74803/4 19.05 .7500

49/64 19.45 .765624/32 19.84 .7812

– 20.00 .787451/64 20.24 .796913/16 20.64 .8125

– 21.00 .826953/64 21.03 .828227/32 21.43 .843855/64 21.84 .8594

– 22.00 .86617/8 22.23 .8750

57/64 22.62 .8906– 23.00 .9055

29/32 23.02 .906259/64 23.42 .921915/16 23.81 .9375

– 24.00 .9449 61/64 24.21 .953131/32 24.61 .9688

– 25.00 .984263/64 25.00 .9844

1 25.40 1.0000

Drill Size Decimal Equivalent

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Drills Size Equivalents

2

Page 3: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Tap Drill Chart

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Drills Technical Reference

3

Tap Size

Drill Size

Probable% thread

0 - 80 3/64 71 - 81

M1.6 x .35 1.25 mm 67 - 77

1 - 64 53 59 - 67

M2 x .4 1/16 72 - 79

1 - 72 53 67 - 75

2 - 56 51 62 - 69

2 - 64 50 70 - 79

M2.5 x .45 2.05 mm 69 - 77

3 - 48 5/64 70 - 77

3 - 56 46 69 - 78

4 - 40 44 65 - 71

4 - 48 42 61 - 68

M3 x .5 40 70 - 79

5 - 40 39 65 - 72

5 - 44 38 63 - 71

M3.5 x .6 33 72 - 81

6 - 32 36 71 - 78

6 - 40 33 69 - 77

M4 x .7 3.25 mm 74 - 82

8 - 32 29 62 - 69

8 - 36 29 70 - 78

10 - 24 25 69 - 75

10 - 32 21 68 - 76

M5 x .8 4.2 mm 69 - 77

12 - 24 17 66 - 72

12 - 28 15 70 - 78

M6 x 1 10 76 - 84

1/4 - 20 7 70 - 75

1/4 - 28 3 72 - 80

5/16 - 18 F 72 - 77

5/16 - 24 I 67 - 75

M8 1.25 6.7 mm 74 - 80

3/8 - 16 5/16 72 - 77

Tap Size

Drill Size

Probable% thread

3/8 - 24 Q 71 - 79

M10 x 1.5 8.4 mm 76 - 82

7/16 - 14 U 70 - 75

7/16 - 20 25/64 65 - 72

M12 x 1.75 13/32 69 - 74

1/2 - 13 27/64 73 - 78

1/2 - 20 29/64 65 - 72

M14 x 2 15/32 76 - 81

9/16 - 12 31/64 68 - 72

9/16 - 18 33/64 58 - 65

5/8 - 11 17/32 75 - 79

5/8 37/64 58 - 65

M16 x 2 35/64 76 - 81

3/4 - 10 21/32 68 - 72

3/4 - 16 11/16 71 - 77

M20 x 2.5 11/16 74 - 78

7/8 - 9 49/64 72 - 76

7/8 - 14 13/16 62 - 67

M24 x 3 53/64 72 - 76

1 - 8 7/8 73 - 77

1 - 12 59/64 67 - 72

1 - 14 15/16 61 - 67

1-1/8 - 7 63/64 72 - 76

1/18 - 12 1-3/64 66 - 72

M30 x 3.5 1-3/64 75

-1/4 - 7 1-7/64 76

1-1/4 - 12 1-11/64 72

1-3/8 - 6 1-7/32 72

1-3/8 - 12 1-19/64 72

M36 x 4 1-1/4 82

1-1/2 - 6 1-11/32 72

1-1/2 - 12 1-27/64 72

Page 4: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Speeds and Feeds for Carbide Drills

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Solid Carbide Drills Technical Reference

4

Material Group Material TypleCutting Speed SFM Cutting Speed SFM Cutting Speed SFM

Carbide 5XD and 8XD Coolant Drills Carbide 5XD and 8XD Coolant Drills Carbide Jobber Drills

Steel

Structural Steel 263 - 328 197 - 230 197 - 230

Free Cutting Steel 328 - 393 197 - 230 197 - 230

Unalloyed Heat Treatable Steel 263 - 295 197 - 230 197 - 230

Unalloyed Case Hard Steel 295 - 328 197 - 230 197 - 230

Alloyed Case Hardened Steel 164 - 246 164 - 197 164 - 197

Nitriding Steel 230 - 262 131 - 164 131 - 164

Acid Resistant /Stainless Steel

Stainless Steel, Sulphured Austenitic Steel, Martensitic 98 - 131 66 - 82 66 - 82

High Tensile Steel

Alloyed Heat Treatable Steel 197 - 262 131 - 164 131 - 164

Tool Steel 131 - 164 131 - 164 131 - 164

High Speed Steel 98 - 131

Spring Steel 98 - 131 66- 82 66- 82

Cast Materials

Cast Iron 328 - 426 230 - 263 230 - 263

Spheroidal Graphite and Malleable Ci 263 - 238 197 - 230 197 - 230

Chilled Ci 66 - 98 32 - 49 32 - 49

Aluminium andAluminium Alloys

Aluminium Alloys 574 - 656 492 - 590 492 - 590

Al Wrought Alloys 574 - 656 492 - 590 492 - 590

Al Cast Alloys < 10%si 525 - 590 328 - 427 328 - 427

Al Cast Alloys > 10%si 525- 590 328 - 427 328 - 427

Special AlloysSpecial Alloys 66 - 82 15 15

Ti and Ti Alloys 66 - 98 15-20 15-20

Non Ferrous Metals

Copper Low Alloys 246 - 295 60-70 60-70

Brass 524 - 590 130-150 130-150

Bronze 246 - 295 100-110 100-110

Magnesium Alloys Magnesium Alloys 574 - 656 120-150 120-150

MaterialFeed (inch/rev) Dia

0.079 0.118 0.197 0.236 0.315 0.394 0.472 0.63 0.787 1

Steel 0.002 0.004 0.005 0.006 0.007 0.009 0.009 0.011 0.012 0.014

High Tensile Steels / Acid Resistant 0.002 0.002 0.003 0.004 0.005 0.006 0.006 0.008 0.010 0.012

Cast Material 0.003 0.004 0.006 0.007 0.008 0.009 0.009 0.011 0.012 0.014

Aluminium Alloys 0.004 0.005 0.007 0.009 0.010 0.012 0.012 0.014 0.016 0.017

Titanium Alloys 0.001 0.002 0.002 0.003 0.004 0.004 0.004 0.006 0.007 0.008

Non Ferrous 0.002 0.003 0.004 0.005 0.007 0.008 0.008 0.010 0.012 0.014

Magnesium Alloys 0.003 0.004 0.005 0.007 0.008 0.010 0.010 0.011 0.012 0.014

Feed Rate IPR

Minimum recommended coolant pressure:

for 1/4" diameter = 400 PSI for 1/2" diameter = 200 PSI for 3/4" diameter = 150 PSI

Recommended starting points

Page 5: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Speeds and Feeds Annular Cutters

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Annular Cutters Technical Reference

5

Material being Cut Hardness (Brinell) SFM

Steels:

Carbon Steel 125-175 85-95

Soft Alloyed Steels 175-225 60-75

Medium Alloyed Steels 225-250 50-75

Hard Alloyed Steels 250-300 30-45

Tool Steels ( D2, H13) 200-250 35-55

Stainless - Ferritic (400 series) 125-175 80-110

Stainless - Austenitic (300 series) 125-175 50-75

Stainless - Austenitic (300 series) 200-275 40-60

Cast Iron:

Soft 110-150 75-100

Medium 150-225 50-80

Aluminum

Wrought 50-150 500-750

Cast 45-125 450-750

Cast Copper – 115-130

SFM = Surface Feet per Minute

RPM (Revolutions per Minute) = (SFM *3.82) / Cutter Diameter (inches)

Feed:• Typical Feed Rate per Tooth is .003" / .004" inches per tool Inches per Minute = # of teeth(flutes) X Feed Rate per Tooth X RPM

Page 6: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

Material being Cut Hardness (Brinell) SFM Feed Rate (In.)

per Flute

Aluminum – 130-150 .002 - .003

Brass & Bronze – 100-130 .002 - .003

Bronze – High Tensil – 40-60 .002 - .003

Cast Iron – Soft 120-175 65-90 .002 - .003

Cast Iron – Mediun Hard 200-275 50-70 .002 - .003

Cast Iron – Chilled 300-375 20-30 .002 - .003

Malleable Cast iron 110-160 45-70 .002 - .003

Plain Carbon Steel

150-225 55-65 .002 - .003

230-325 40-50 .002 - .003

330-400 25-35 .001 - .002

Alloyed Steel

150-225 55-65 .002 - .003

230-325 30-40 .002 - .003

330-400 20-30 .002 - .003

Tool Steel150-250 40-50 .002 - .003

255-375 20-30 .002 - .003

Stainless – Free machining 135-185 40-50 .001 - .002

Stainless – 300 series 135-300 35-45 .001 - .002

Stainless – PH 300-375 20-30 .001 - .002

Calculations:

RPM’s = (3.82 X SFM)/ reamer diameter in inchesInches per Min (IPM) = Feed per flute X # of flutes X RPM

   

diameter  in  inches stock  removal  in  inches.25" 0.008.50" 0.012.75" 0.0151.0" 0.0181.25" 0.0191.5" 0.021.75" 0.0212.0" 0.0222.25" 0.0232.5" 0.0240  

0.005  

0.01  

0.015  

0.02  

0.025  

0.03  

.25"   .50"   .75"   1.0"   1.25"   1.5"   1.75"   2.0"   2.25"   2.5"  

Stock  Removal  Amount  

Hole  Diameter  

Recommendated  stock  removal  in  inches  for  Reaming  

Tech Tips:• Chatter may result when speed is too high• Too low a feed may produce chatter and excessive reamer wear• Too high a feed may reduce hole size accuracy• When not enough material is being reamed, increase feed rate or decrease pre-reaming hole size• Reamer will follow the existing hole. Only end cutting reamers (like an end mill) can cut their own path• Standard reamer chamfer angle is 45 degrees. When starting the reamer if you run into difficulty, reduce the angle 30

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Recommended Feeds and Speeds for HSS Finish Reaming

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Reamers Technical Reference

6

Page 7: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Recommended Speeds for Carbide Headed Burrs

Recommended starting points for Speeds and Feeds for Counterboring and Countersinking

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Carbide Burrs Technical Reference

Counterbores and Countersinks

Technical Reference

7

Burr Diameter RPM

3/16" 30,000

1/4" - 3/8" 25,000

7/16- 1/2" 20,000

5/8" - 3/4' 15,000

1" 12,000

Material Speed (SFM)

Mild Steel 75-85

Alloy Steel 40-80

Cast Iron - Soft 120-140

Brass 150-300

Cutting Major Diameter Inch per Rev.

1/4 to 3/8 .003 - .005

7/16 to 5/8 .004 - .006

11/16 to 7/8 .005 - .007

15/16 to 1-3/16 .006 - .008

1-1/4 to 1-1/2 .007 - .009

Double cut burrs are not recommended for machining Aluminum, Zinc, or Plastic

Speed

Feed

Page 8: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Speeds and Feeds for Solid Carbide End Mills – Variable Helix End Mills

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Solid Carbide End Mills Technical Reference

8

Material SFMChip Load Per Tooth

1/8” 1/4” 1/2” 1”Aluminum Alloys 1120 0.0010 0.0020 0.0040 0.0080Carbon Steel 300-600 0.0010 0.0015 0.0030 0.0060Cast Iron 350-550 0.0010 0.0015 0.0030 0.0060Copper Alloys 500-900 0.0010 0.0020 0.0030 0.0060Steel – Annealed 350-500 0.0010 0.0020 0.0030 0.0050Steel – Rc 18-24 150-500 0.0004 0.0008 0.0015 0.0045Steel – Rc 25-37 125-200 0.0003 0.0005 0.0010 0.0030Stainless Steel – Free Machining 250-400 0.0005 0.0010 0.0020 0.0030Stainless Steel – Other 150-300 0.0005 0.0010 0.0020 0.0030Inconel/Monel 60-100 0.0005 0.0010 0.0015 0.0030Titanium 175-300 0.0005 0.0008 0.0015 0.0030

Carbide Roughing End Mills

End Mills for Aluminum

MaterialSFM

ExampleChip Load Per Tooth

Under 32 HRc Over 32 HRc 1/4” 3/8” 1/2”Carbon Steel 200-450 100-250 10, 11, 13xx .0014-.0019 .0020-.0030 .0030-.0040Alloy Steel 150-400 80-280 40, 41, 42xx .0012-.0017 .0018-.0025 .0025-.0035Grey Cast Iron 250-500 140-300 – .0012-.0017 .0018-.0025 .0025-.0035Ductile Cast Iron 120-400 90-150 – .0012-.0017 .0018-.0025 .0025-.0035SS 300 Series 150-550 100-240 304, 316, 304L .0015-.0020 .0020-.0030 .0030-.0040SS 400 Series 150-400 100-280 420, 420F .0015-.0020 .0020-.0030 .0030-.0040Precipitation Steel 100-400 90-240 15-5PH,16-6PH .0015-.0020 .0018-.0030 .0025-.0040High Temp. Alloys 60-150 50-160 Inconel .0010-.0015 .0015-.0025 .0020-.0030

MaterialSFM

ExampleChip Load Per Tooth

Under 32 HRc Over 32 HRc 5/8” 3/4” 1”Carbon Steel 200-450 100-250 10, 11, 13xx .0038-.0044 .0038-.0053 .0060-.0080Alloy Steel 150-400 80-280 40, 41, 42xx .0031-.0044 .0038-.0053 .0050-.0070Grey Cast Iron 250-500 140-300 – .0031-.0044 .0038-.0053 .0050-.0070Ductile Cast Iron 120-400 90-150 – .0031-.0044 .0038-.0053 .0050-.0070SS 300 Series 150-550 100-240 304, 316, 304L .0035-.0050 .0040-.0060 .0055-.0080SS 400 Series 150-400 100-280 420, 420F .0035-.0050 .0040-.0060 .0055-.0080Precipitation Steel 100-400 90-240 15-5PH,16-6PH .0030-.0045 .0035-.0055 .0050-.0070High Temp. Alloys 60-150 50-160 Inconel .0025-.0040 .0030-.0045 .0040-.0060

Note: All speeds and feeds are suggested starting points. They may be increased or decreased depending on machine condition, depth of cut, finished required, coolant, etc.

Material SFMChip Load Per Tooth

1/8” 1/4” 5/16” 3/8” 1/2” 5/8” 3/4” 1”Aluminum Alloys 1120 1600-2000 0.0015 0.0040 0.0050 0.0060 0.0070 0.0080 0.0100Brass/Bronze 300-600 800-1500 0.0015 0.0040 0.0050 0.0060 0.0070 0.0080 0.0100Copper Alloys 350-550 800-1200 0.0015 0.0040 0.0050 0.0060 0.0070 0.0080 0.0100Plastics 500-900 1200-1600 0.0030 0.0080 0.0100 0.0120 0.0140 0.0160 0.0180

Page 9: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

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Recommended Speeds and Feeds for Side Milling Cutters

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Milling Cutters and Saws Technical Reference

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• Depth of cut = .050” to .250” • Use higher recommended speed and feed for smaller depth of cut

Standard Keyways for Milling Cutters & Saws

Material to be MachinedHardness

(BHN)SFM

rangeChip loads per tooth

Range

Free Machining Carbon Steels 1212, 1108, 1213, 1116,1118,1211, 1140, 1151 100-150 120-180 .002-.006"

Free Machining Carbon Steels - leaded 12L14 100-150 120-190 .002-.006"

Carbon Steel - wrought low Carbon = 1009, 1011, 1012, 1016, 1018, 1022,1025, 1518 medium Carbon = 1030, 1035,1040,1045,1049,1053,1524 high Carbon = 1070, 1075, 1090, 1551

85-125 100-130 .002-.006"

125-200 75-90 .002-.006"

200-250 50-70 .002-.005"

Alloyed steel 4110 4120 4140, 4320, 5120, 8115 8620 175-225 50-65 .002-.004"

Ductile Cast Iron class 25, 30, 35, 40, 45 & 50 190-225 80-100 .002-.006"

Stainless Steel 175-225 50-65 .002-.004"

230-300 40-60 .002-.004"

Aluminum Alloys 2024,5050, 5056, 6061 N/A 200-400 .002-.010"

Cutter Hole Diameter Nominal size square KEY

1/2" 3/32"

5/8" 1/8"

3/4" 1/8"

7/8" 1/8"

1" 1/4"

1-1/4" 5/16"

1-1/2" 3/8"

1-3/4" 7/16"

2" 1/2"

2-1/2" 5/8"

3" 3/4"

3-1/2" 7/8"

4" 1"

4-1/2" 1-1/8"

5" 1-1/4"

Revolution per Minute (RPM)= (3.82 x SFM)/ Cutter DiameterInches per Revolution (IPR) feed rate = Chip load per tooth x # of teethInches per Minute (IPM) feed rate = IPR x RPM

Page 10: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

Round Adjustable Dies

Round Adjustable Dies Technical Reference

Taps Technical Reference

• Advancing the adjusting screw opens up the die resulting in slightly larger cutting size

• Retracting the screw closes when holding screw is tightened, resulting in a slightly smaller cutting size

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10

Regular Hand Tap Dimensions

Dia of Tap

Threads per Inch OverallLength, A

Length of Full Thread, B

Length of Square, C

Dia of Shank, D

Size of SquareNC NF N8 N10

1/4 20 28 – – 2-1/2 1 5/16 .255 .1915/16 18 24 – – 2-23/32 1-1/8 3/8 .318 .2383/8 16 24 – – 2-15/16 1-1/4 7/16 .381 .2867/16 14 20 – – 3-5/32 1-7/16 13/32 .323 .2421/2 13 20 – – 3-3/8 1-21/32 7/16 .367 .2759/16 12 18 – – 3-19/32 1-21/32 1/2 .429 .3225/8 11 18 – – 3-13/16 1-13/16 9/16 .480 .3603/4 10 16 – – 4-1/4 2 11/16 .590 .4427/8 9 14 – – 4-11/16 2-7/32 3/4 .697 .5231 8 12 – 10 5-1/8 2-1/2 13/16 .800 .600

1-1/16 – 12 8 10 5-1/8 2-1/2 7/8 .896 .6721-1/8 7 12 8 10 5-7/16 2-9/16 7/8 .896 .6721-3/16 – 12 8 10 5-7/16 2-9/16 1 1.021 .7661-1/4 7 12 8 10 5-3/4 2-9/16 1 1.021 .7661-5/16 – 12 8 10 5-3/4 2-9/16 1-1/16 1.108 .8311-3/8 6 12 8 10 6-1/16 3 1-1/16 1.108 .8311-7/16 – 12 8 10 6-1/16 3 1-1/8 1.233 .9251-1/2 6 12 8 10 6-3/8 3 1-1/8 1.233 .9251-5/8 – – 8 10 6-11/16 3-3/16 1-1/8 1.305 .9791-3/4 5 5-1/2 8 10 7 3-3/16 1-1/4 1.430 1.0721-7/8 – – 8 10 7-5/16 3-9/16 1-1/4 1.519 1.139

2 4 4-1/2 8 10 7-5/8 3-9/16 1-3/8 1.644 1.2332-1/8 – – 8 – 8 3-9/16 1-3/8 1.769 1.3272-1/4 4 4-1/2 8 – 8-1/4 3-9/16 1-7/16 1.894 1.4202-3/8 – – 8 – 8-1/2 4 1-7/16 2.019 1.5142-1/2 4 – 8 – 8-3/4 4 1-1/2 2.100 1.5752-3/4 4 – 8 – 9-1/4 4 1-9/16 2.350 1.762

3 4 – 8 – 9-3/4 4-9/16 1-5/8 2.543 1.9073-1/4 4 – 8 – 10 4-9/16 1-3/4 2.793 2.0953-1/2 4 – 8 – 10-1/4 4-15/16 2 3.008 2.2563-3/4 4 – 8 – 10-1/2 5-5/16 2-1/8 3.217 2.413

4 4 – 8 – 10-3/4 5-5/16 2-1/4 3.467 2.600

Fractional Sizes – Regular Length – ANSI Table 302

• American Standard• Ground Thread• High Speed Steel

Page 11: Technical Reference for Cutting Tools Drill Chart Drills Technical Reference 3 Tap Size Drill Size Probable % thread 0 - 80 3/64 71 - 81 M1.6 x .35 1.25 mm 67 - 77 1 - 64 53 59 - 67

Diar of Tap

Threads per Inch N12

OverallLength, A

Length of Full Thread, B

Length of Square, C

Diaof Shank, D

Size of Square

1-5/8 12 5 2 1-1/8 1.305 .9791-3/4 12 5 2 1-1/4 1.430 1.0721-7/8 12 5 2 1-1/4 1.519 1.139

2 12 5 2 1-3/8 1.644 1.2332-1/8 12 5-1/4 2 1-3/8 1.769 1.3272-1/4 12 5-1/4 2 1-7/16 1.894 1.4202-3/8 12 5-1/4 2 1-7/16 2.019 1.5142-1/2 12 5-1/4 2 1-1/2 2.100 1.5752-5/8 12 5-1/2 2 1-1/2 2.100 1.5752-3/4 12 5-1/2 2 1-1/2 2.100 1.5752-7/8 12 5-1/2 2 1-1/2 2.100 1.575

3 12 5-1/2 2 1-1/2 2.100 1.5753-1/8 12 5-1/2 2 1-1/2 2.100 1.5753-1/4 12 5-1/2 2 1-1/2 2.100 1.5753-3/8 12 5-1/2 2 1-1/2 2.100 1.5753-1/2 12 5-3/4 2 1-1/2 2.100 1.5753-5/8 12 6 2 1-3/4 2.100 1.5753-3/4 12 6 2 1-3/4 2.100 1.5753-7/8 12 6 2 1-3/4 2.100 1.575

4 12 6 2 1-3/4 2.100 1.575

Fractional Sizes – Short Length

• American Standard• Ground Thread• High Speed Steel

Tap Sizes

Basic Major Dia

Threads per inch Number of Flutes

Overall Length

A

Length of Thread

B

Length of Square

C

Diameter of Shank

D

Size of SquareNC

UNCNF

UNF0 0.060 80 2 1-5/8 5/16 3/16 0.141 0.1101 0.073 64 72 2 1-11/16 3/8 3/16 0.141 0.1102 0.086 56 64 3 1-3/4 7/16 3/16 0.141 0.1103 0.099 48 56 3 1-13/16 1/2 3/16 0.141 0.1104 0.112 40 48 3 1-7/8 9/16 3/16 0.141 0.1105 0.125 40 44 3 1-15/16 5/8 3/16 0.141 0.1106 0.138 32 40 3 2 11/16 3/16 0.141 0.1108 0.164 32 36 4 2-1/8 3/4 1/4 0.168 0.13110 0.190 24 32 4 2-3/8 7/8 1/4 0.194 0.15212 0.216 24 28 4 2-3/8 15/16 9/32 0.220 0.165

Regular Hand Tap DimensionsMachine Screw Sizes – ANSI Table 304

• Ground Thread• Right Hand• High Speed Steel M2

Regular Hand Tap Dimensions

Taps Technical Reference

11

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©2014 Toolmex Corporation, Inc. All rights reserved. All specifications on this sheet are subject to change without notice. Photos shown are a general representation of the various models and may include some optional equipment. Toolmex Industrial Solutions and TMX Cutting Tool Solutions are trademarks of Toolmex.


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