Gear Cutting & Grinding: a buyer's sourcing guide
Everything a procurement team should know before opening an RFQ for gear cutting & grinding: materials, tolerances, certifications and red flags.
Recent RFQs in gear cutting & grinding
Overview
Gear cutting produces spur, helical, bevel and worm gears via hobbing, shaping, skiving and final grinding. Quality class (DIN/ISO) and case-hardening dictate cost more than diameter.
When to choose this process
Whenever the application needs controlled transmission ratios, low backlash and predictable noise, vibration, harshness.
Typical materials
- 18NiCrMo5
- 16MnCr5
- 42CrMo4
- Stainless 17-4PH
- Bronze for worm wheels
Typical tolerances
DIN 5 (high precision) to DIN 10 (industrial); profile and pitch ±5–20 μm.
Certifications to ask for
- ISO 9001
- IATF 16949
- DIN 3962/3967 quality classes
Frequently asked questions
Do I need ground gears?
Above ~20 m/s pitch line velocity or below 70 dB NVH target, yes. Industrial low-speed gears often run hobbed + shaved.
Hobbing vs power skiving?
Power skiving is 3–5× faster on internal gears and short shafts; hobbing remains king on external gears of medium-large modules.
Sourcing countries covered
Editorial market guide. Supplyria is a marketplace; we don't list private suppliers on this page. Cost ranges and lead times are indicative and based on public industry benchmarks.