Large gears and ring gears
Girth gears · ring gears · internal teeth
Ring gears, hobbed or shaped in-house. Two-piece and split designs are machined as a set, so the joint faces and the tooth pitch agree when the halves bolt together. Blanks are stabilised before the teeth are cut, and the finished gear is checked again after hardening.
Specifications
- Tooth forms
- Spur · helical · herringbone · internal
- Module and accuracy grade
- Confirmed at drawing review
- Blank
- Cast, forged or rolled ring, with mill certificate
- Heat treatment
- Quenching and tempering · induction hardening
Typical use
- Kilns and tube mills in cement plants
- Grinding mills and crushers in mining
- Reducers, gear drives and kiln drives
- Sugar mills, metallurgy and power plants
Split gears are pre-assembled before dispatch so the joint is checked on our floor, not on yours.
Typical process
01
Blank
cast or forged, mill certificate
02
Rough turning
large-diameter vertical set-up
03
Quenching and tempering
uniform structure, relieved stress
04
Finish turning
face and bore datums
05
Hobbing / shaping
external and internal teeth
06
Tooth-surface hardening
parameters by material and module
07
Re-inspection
pitch, runout, fit
08
Export packing
rust prevention, crate, lifting points
Stepped shafts · gear shafts · spindles
Need us to confirm fixturing and operations against your drawing? Send the part size, material and quantity; we will review the process against the machines we have.
Send a drawing, get a quote