Mitsubishi M-H60D Spindle Repair

Possible cause of failure:

  • Front bearing failure from contamination
  • Rear bearings spun in the rear housing
  • Rear housing is oversized
  • Rear shaft journal is undersized
  • Taper has runout
  • Rear shaft labrynth is damaged and bent
  • Customer sent rear housing but no cover or labrynth
  • Missing the bolts for the drive gear
  • O-rings, grippers, bellevilles and reamer bolts need to be replaced

Recommended action:

  • Clean, inspect overall dimensions
  • Replace bearings, o-rings, grippers, bellevilles and reamer bolts
  • Grind chrome plate rear housing
  • Grind chrome plate rear shaft journals
  • Kiss grind the taper
  • Manufacture a new rear shaft labrynth
  • Adjust preload, balance, assemble and break in
  • Final quality control inspection


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