Gear Manufacturing Guide: Hobbing, Shaping, Broaching & Grinding Explained

Gear Manufacturing Guide: Hobbing, Shaping, Broaching & Grinding Explained

Short answer: Gears are made by cutting teeth into a blank — hobbing for spur and helical gears, shaping for internal teeth, broaching for splines — then hardened and finish-ground for quiet, accurate running. The method is chosen by tooth geometry, volume and the hardness the gear must reach in service, with tight control of pitch, profile and runout.

At a Glance

Gear Manufacturing Guide: Hobbing, Shaping, Broaching & Grinding Explained chart
Figure 1 – Gear Manufacturing Guide: Hobbing, Shaping, Broaching & Grinding Explained overview.

Gear Cutting Methods

Blanks come from Forging Vs Casting and Metal Radial Forging Guide; relate to Metal Machinability Guide and Metal Grinding Guide. Stock from Tool Steel Supplier is typical.

Quality & Heat

Harden by Metal Age Hardening Guide or Metal Case Hardening Guide; inspect by Metal Ndt Guide and document per Mill Test Certificate Guide. Relate to Metal Wear Mechanisms Guide.

QA & Supply

Protect gears via How To Prevent Metal Rust. HXSCO supplies gear-grade steel and blanks to spec.

Get a Quote

Tell HXSCO your requirements and we will respond with a competitive quote and lead time.

Frequently Asked Questions

How are gears cut?

Hobbing, shaping and broaching cut teeth into a blank.

Hobbing vs shaping?

Hobbing is fast for spur/helical; shaping does internal teeth.

Why grind gears?

Grinding finishes hardened gears for quiet, accurate mesh.

What steel for gears?

Case-hardening and through-hardening alloy steels.

Do you supply gear stock?

HXSCO supplies gear-grade steel and forged blanks.

Source Gear-Grade Metal from HXSCO

HXSCO supplies gear-grade alloy steel and forged blanks for hobbing, shaping and grinding. Send your spec and quantity for a quote.

Request a Quote