Okuma VTT 70 Spindle Throws Part and Seizes



CHALLENGE

Spindle was seized incoming. Customer indicated it threw a part and crashed. #2 front bearing had a cracked inner and outer race from spindle being crashed. Face of the lathe taper has visible damage from the crash.

SOLUTION

Clean, inspect overall dimensions. Manufacture a key. Repair lathe face. Manufacture a pulley nut lock washer. Replace bearings, screws and orings. Adjust preload, balance, assemble and break in. Final quality control inspection.

DETAILED CAUSE OF FAILURE

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