Measure the groove diameter of shafts and keyways
Absolute encoder, the original data remains after power off
One turn of sleeve makes .2″ spindle feed
Measurement accuracy is not affected by the use of sleeve
Press the fork, the spindle retracts .12″
Linear ball bearings for ten million times use
Carbide spindle and anvil

Dynabrade 78424 4-1/2" Dia. x 3/8" Medium DynaBrite Surface Conditioning Disc, 25/pack
3M™ 53797, Flexible Diamond Belt 6451J, 1/2" Dia x 18" L, M125 Micron, Type G, Pattern B2, 7010509272
Norton 66623325035 - 2" 120 Grit Fine Grade Aluminum Oxide Vortex Rapid Prep Green TR Non-Woven Surface Preparation Disc, 50 Each 
