Mori Seiki SH400 Spindle Repair

Possible cause of failure:
Front bearing failure from coolant contamination,#1 has the most contamination.
Shaft taper is bell mouthed.
Drive dogs have slight cosmetic wear
Splash ring and coolant plunger assembly’s are worn

Recommended action:
Clean, inspect overall dimensions.
Grind, plate and finish grind the taper.
Replace bearings, o-rings, oil line, and splash ring.
Adjust preload, balance, assemble and break in. Final quality control inspection.

View of the contaminated front bearings


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