Hitachi Seiki VS50 Spindle Repair

Possible cause of failure:
Catastrophic failure of the #1 front bearing.
Front and rear housing bands are oversized and have a pre existing score mark.
Taper is out of ISO specification.
Seals are worn.
Gripper balls are worn.
Bolts are worn.

Recommended action:
Clean, inspect overall dimensions.
Replace bearings.
Front and rear housing need grind plate grind.
Taper needs grind plate and finish grind.
Replace gripper balls, seals and bolts.
Adjust preload, balance, assemble and break in. Final quality control inspection.



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