supply gear ring,we equip many gear machining machine,have some gear inspect tools to reach to 

the customer's requirment,

now these parts used in auto parts,tractor parts,machinery,agriculture machinery,

the material  is 45#,40Cr,20CrMnTi,22CrMo.etc,after machining we will heat treatment these parts 

to get a better hardness,wear resistance.

the gear is a precise parts, the better precision means good performance in using, less noise,vibration

some times we grinding the gear surface by special machine.and inspect by the roughness detector.