Ewag Spindle Failed From Contamination



CHALLENGE

Possible cause of failure: Spindle bearings felt very rough when rotated by hand. Front & rear bearings failed from contamination with coolant & swarf, grease was almost completely washed out. Shaft tooling pilot 18mm OD is -9µ undersized with 6µ runout, pilot face has 6-8µ runout.

SOLUTION

Recommended action: Clean, inspect overall dimensions. Grind, chrome plate & finish grind tooling pilot OD, kiss grind pilot face. Replace bearings, o-ring, 90° push connect fitting, 3mm alignment pin. Adjust preload, balance, assemble and break in. Final quality control inspection.

DETAILED CAUSE OF FAILURE

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