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3M™ Cubitron™ II Conventional Wheels for Gear Grinding

Take your manufacturing process to the next level of productivity – with 3M™ Cubitron™ II Conventional Wheels for gear grinding.

StrengthSuperior

Expected Precision

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Grinding

A new dimension of gear grinding performance3M™ Cubitron™ II Gear Grinding Wheels are engineered to help you achieve consistent, high-quality finishes and tight geometry tolerances, part after part – while increasing the efficiency and productivity of your operations.

• Increased throughput – Reduce machining time by up to 50% in some applications. Faster grinding and less downtime for truing.

• Less wheel dressing – Cubitron II Gear Grinding Wheels are strong enough to maintain their shape and free-cutting ability for an extended time. More time between dressing cycles, faster feed rates and lower costs per part.

• Dramatically lower risk of burning – Practically eliminates the risk of abrasive burning under typical grinding conditions. Despite high contact, virtually no thermal load is created between Cubitron II Gear Grinding Wheels and the workpiece, even under extreme grinding conditions.

• Extended wheel life – Cubitron II Gear Grinding Wheels provide up to 2 to 3 times the service life of conventional ceramic wheels.

• Consistent grinding performance – Delivers high quality, in-spec finishes every time. In repeated tests and trials, these wheels generated reliable and consistent results, making the grinding process easier and more predictable.

Precision

New 3M™ Cubitron™ II Gear Grinding Wheels are the result of incorporating both 3M’s revolutionary precision-shaped grain and state-of-the-art bonding systems. Cubitron II Gear Grinding Wheels form part of today’s most innovative portfolio of advanced abrasive technologies.

3M™ Cubitron™ II Conventional Wheelsfor Gear Grinding

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The science of 3M Precision-Shaped GrainThe secret behind the strength and performance of Cubitron II Gear Grinding Wheels lies in the revolutionary precision-shaped ceramic grain technology pioneered by 3M. As the triangular shaped grain wears, it continuously fractures to form sharp points and edges that slice through metal, wear evenly and provide super-long life and consistency.

With conventional abrasives, standard grinding consumes up to 10× more energy than other metal removal processes, such as turning or milling. The sharp cutting edges of Cubitron II Gear Grinding Wheels, however, use less energy than standard grinding – while diverting heat away from the workpiece. The free-cutting properties and superior service life of Cubitron II Gear Grinding Wheels can help improve efficiency and drive down costs compared to conventional ceramic wheels.

3M™ Cubitron™ II Single Rib Grinding Wheels• Wind turbines

• Transmissions

• Planetary, spur and hollow gears

• Pinion shafts

3M™ Cubitron™ II Threaded Grinding Wheels• Automotive

• Spur and pinion gears

• Pinion shafts

3M™ Cubitron™ II Spiral Bevel Grinding Wheels• Automotive

• Aviation

• Agriculture

• Construction and industrial machinery

3M Precision-Shaped Grains “slice” through metal – staying cooler, cutting faster and lasting longer.

Conventional ceramic abrasive grain tends to “plow” through the metal, causing heat to build up in the workpiece and the abrasive.

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3M™ Cubitron™ II Single Rib Grinding Wheels 968SR and 963SRThese advanced abrasive wheels can potentially cut your grinding cycle times in half! Cubitron II Single Rib Grinding Wheels grind faster and last longer than conventional abrasive wheels, helping you maximize the efficiency and productivity of your operations.

With high removal rates, Cubitron II Single Rib Grinding Wheels require less machine power and can even eliminate the need for hobbing/gashing.

One wheel can grind and finish various gear materials, from soft to hardened steel. And the longer grinding chips make coolant filtration easier and could result in cleaner, longer-lasting coolant, less machine wear and better part quality.

• Minimal risk of burning

• Up to 50% shorter grinding cycles

• Up to 60% less truing

• Up to 3× longer wheel life

3M™ Cubitron™ II Conventional Wheelsfor Gear Grinding

A cool wayto increase productivity

* If the root is not ground

968SR, 80+ 963SR, 80+

Wheel Speed (Vc)Hardened Steel 30m/s

Wheel Speed (Vc)Hardened Steel 30m/s

Quenched and Tempered 35m/s Quenched

and Tempered 35m/s

Feed Rate (Vw)Standard Machines 3,500 mm/min

Feed Rate (Vw)Standard Machines 3,500 mm/min

Höfler Rapid Series 9,000–12,000 mm/min Höfler Rapid Series 9,000–12,000

mm/min

Material Removal Rate (Q´w)

Hardened Steel 24– 30 mm3/mm/sec Material

Removal Rate (Q´w)

Hardened Steel 24– 26 (30) mm3/mm/sec

Quenched and Tempered

20– 23 (30*) mm3/mm/sec

Quenched and Tempered

16– 20 (24) mm3/mm/sec

Chip Volume (V´w)Roughing 4,000–6,000

mm3/minChip Volume (V´w)

Roughing 3,000– 5,000 mm3/min

Finishing 300– 700 mm3/mm Finishing 300– 500

mm3/mm

Chip volume: V’w is given in mm3/mm (volume removed per mm wheel width) and refers to the volume removed until redressing is initiated.Dressing – Roughing: Overlap ratio qd 1.0, dress ratio 0.6 synchronousDressing – Finishing: Overlap ratio qd 4 to 6 (8), dress ratio -0.6 to -0.8 asynchronous.

Competitive Ceramic Wheel

Cubitron II Single Rib Wheel

25

Double Flank Roughing & Finishing

3.02

9.7

4.77

18.6

21.8

6.4

Double Helical Bull Gear

Double Helical Pinion

20

15

10

5

0

Removal Rate, Q’w (mm3/mm/s)

3M™ Cubitron™ II Single Rib Grinding Wheels

9876543210

4

6

2.5

8

Double Helical Bull Gear

Double Helical Pinion

Parts per Wheel

Case in Point: One manufacturer of double helical bull gears was able to grind an estimated 4 gears per Cubitron II Single Rib Grinding Wheel – compared to 4-6 wheels per gear with a competitive ceramic abrasive product.

z

x

y

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Dimensions by machine type

Various dimensions are available for conventional machine types. Profiling as specified: module m, mobility gg, pressure angle Ew.

Operating Parameters/Specifications

80+, 120+Application as of module

1.5–10 mm

80+Application as of module

4– 6 mm

Cutting speed (Vc) 80 m/s 63 m/s

Feed rate (V’w) 0.8 – 1.2 mm/U roughing, 0.45 – 0.65 mm/U finishing

Mobility Maximum Maximum

Delivery (ae) Delivery ae is a Q’w function. Set total delivery in roughing stroke (to module 6). Finishing stroke 0.02mm on flank (at 20° pressure angle = 0.06 mm radial)

MRR (Qmax) Dependent on worm mobility – generally approx. 300 – 600 m3/s

Theoretical average chip thickness (hnom) 0.2 – 0.7 μm 0.2 – 0.7 μm

Shifting

• 30% reduction compared to standard values (Reishauer machines, etc.)• 30% longer tool life of Liebherr machines• Shift speed depending on module between 0.015 and 0.035 mm per mm stroke• Cutting strategy for case-hardened steel: 1× roughing stroke and 1× finishing stroke• 2× roughing stroke for low-performing machines with extremely increased feed rates

Total Cycle Time (seconds)300

50

0

250

200

150

100

Spur Gear

Helical Gear

Helical Gear

13

66

40

283

132

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Removal Rate (Qmax, mm3/s)

1000

400

900

300

800

200

700

100 132158

267

148

387433

883

254

600

0

500

Spur Gear

Helical Gear

Helical Gear

Planetary Gear

Reishauer Liebherr Gleason Kapp Höfler275 × 125 × 160 195 × 200 × 90 220 × 180 × 90 240 × 125 × 115 400 × 280 × 160275 × 160 × 160 240 × 230 × 110 240 × 125 × 120 280 × 160 × 115300 × 125 × 160 320 × 230 × 110 320 × 125 × 115300 × 145 × 160

Surface speed Vc

Shift movement (mm/mm/stroke)

Stroke movement

Infeed ae max(mm per stroke)

Feed rate fz max(mm/rev)

Competitive Ceramic Wheel

Cubitron II Single Rib Wheel

into high gear

3M™ Cubitron™ II Threaded Grinding Wheels

3M™ Cubitron™ II Threaded Grinding Wheel 965WTooth flank grinding operations demand exceptional dimensional and contouring accuracy. Cubitron II Threaded Grinding Wheels not only dramatically reduce the risk of abrasive burning, but also achieve consistently tighter tolerances and higher grinding parameters than standard tools.

• Minimal risk of burning

• Up to 50% shorter grinding cycles

• Up to 50% less truing

• Up to 2× longer wheel life

Case in Point: One manufacturer of planet gears obtained 2-3× faster material removal rate using Cubitron II Threaded Grinding Wheels compared to a competitive ceramic wheel.

Shift

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3M™ Cubitron™ II Spiral Bevel Grinding Wheel 964BVSpiral bevel gears are designed to transmit high loads at right angles, and are typically used in vehicle differentials, marine drives and industrial conveyors – applications where reliability and efficient, low-maintenance performance are crucial.

Cubitron II Spiral Bevel Grinding Wheels can achieve tight tolerances and deliver high-quality, smooth-running final parts – all at twice the feed rate, so you can produce more gears per wheel.

Transportation

• Automotive drive systems

• Commercial trucks

• Helicopters and other rotorcraft drive systems

Agricultural

• Tractors• Harvesters

• Hay machines• Irrigation

Industrial Machinery

• Heavy-duty construction and mining machines

• Forklifts

• Conveyor drives• Marine drives

Coverall the angles

Case in Point:

A crown gear manufacturer obtained excellent results with Cubitron II Spiral Bevel Grinding Wheels, and was able to reduce grinding time from 3:50 to 1:36, tripling the feed rate from 40 mm/min to 120 mm/min compared to a competitive ceramic wheel.

0

50

100

150

200

250

Crown Gear

80+ Total Cycle Time (minutes)

230

96

200

180

160

140

120

100

80

60

40

20

0Crown Gears

80+ Feed Rate (mm/min)

40

120

60 60

150

180

Competitive Ceramic Wheel

Cubitron II Single Rib Wheel

3M™ Cubitron™ II Conventional Wheelsfor Gear Grinding

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Dressing Systems

3M develops and supplies precision dressing systems for all types of grinding machines. Dressing system quality has a determining influence on the efficiency and economy of the overall grinding process. For this reason, dressing systems require high-quality components in terms of both stiffness and precision. 3M™ Wendt™ Dressing Systems meet the highest requirements, whether for standard versions or custom built solutions.

Dressing EquipmentInline Cantilever

SpindlesOutboard Support Dresser Spindles

Quick Change Spindle Arbors

Infeed Dresser Systems

Rotary Dressers

• Full Form Dressers for threaded and worm wheels

• CVD Dressing Discs for single rib wheels

Features• Reverse Plated

• Random Set, Hand Set and Combination

• Sinter Bonds with Controlled Density, Size and Orientation

During the abrasive cutting process, the grinding wheel is subject to wear and to clogging with detritus. As a consequence, the defined cutting topography, which is made up of abrasive grains and bonding material, gradually changes. While Cubitron II wheels have proven to lower the dress frequency, it is still necessary to maintain the defined cutting topography by repeated dressing in order to make the best use of potential wheel life.

3M™ Wendt™ Diamond Roller Dressers meet the most demanding requirements, as they can transfer highly accurate profiles within very short dressing cycle times via plunge dressing into vitrified grinding wheels.

Dressfor success

3M™ Wendt™ Dressing Solutions for Gear Grinding

3M™ Wendt™ Dressing Products are engineered to work efficiently with 3M™ Cubitron™ II Conventional Wheels for Gear Grinding, by matching wheel specification to the diamond roll.

These products are designed and manufactured for use in precision grinding operations.

While Cubitron II wheels can drastically decrease dressing frequency, 3M supplies and will continue to develop the best combination of products for your best results utilizing our technical resources across the globe.

Please recycle. Printed in USA. © 3M 2013. All rights reserved. Issued: 10/13 9316HB 61-5002-8352-0

Abrasive Systems Division3M Center, Building 223-6S-03St. Paul, MN 55144-10001-866-279-1235www.3M.com/abrasives

3M, Cubitron and Wendt are trademarks of 3M Company. Used under license by 3M subsidiaries and affiliates.

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Warranty, Limited Remedy, and Disclaimer: Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and performance of a 3M product in a particular application. User is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user’s method of application. Unless an additional warranty is specifically stated on the applicable 3M product packaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price.

Limitation of Liability: Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability.

For more than 100 years, 3M has been a world leader in developing advanced abrasives to meet today’s toughest processing challenges. Together with the former Winterthur Technologies Group, which is now part of 3M, we help customers in virtually every industrial sector improve productivity, cut costs and achieve the consistent, high-quality finishes they need to compete in a world marketplace.

The 3M, Winterthur, Wendt and SlipNaxos brands are recognized and trusted worldwide for reliable quality and precision abrasive products used in a wide variety of industries, including automotive, oil and gas, cutting tools, aircraft and land-based turbines, and much more.

For additional information, visit www.3M.com/abrasives.

3M™ Cubitron™ II Conventional Wheelsfor Gear Grinding