Hardinge Conquest T42 Spindle Repair

Possible cause of failure:

#1 front bearing failure from contamination.
Front cover was slightly damaged when front bearing failed.
ID taper has 8 microns runout. Front OD lathe taper has slight damage.
Shaft tail has 10-14 microns runout.
Rear rotating parts not supplied: actuator assembly, brake disc, etc., also 16C colletRepair action:
Clean, inspect overall dimensions.
Replace bearings, front cover gasket, & rear shaft ID seal.
Kiss grind ID taper to correct runout, cosmetic kiss to OD taper
Grind, plate & regrind rear pulley area to correct shaft tail runout.
Adjust preload, balance, assemble and break in. Final quality control inspection.

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