Churchill Spindle Repair failure from contamination



CHALLENGE

Cause of failure: Spindle was seized incoming, spindle nose was heavily corroded. Rust in spindle interior. Spindle was previously converted from oil bath to greased bearings by another company. This conversion, if not done properly, can result in coolant contamination to the bearings. Interior of spindle is full of oil/coolant which caused bearing failure due to contamination of the grease. Front shaft nut spanner holes are damaged from the previous rebuild. We recommended the installation of a front air purge to reduce the possibility of further contamination.

SOLUTION

Recommended action: Clean, inspect overall dimensions. Install front air purge. Plug holes in the top of the casting to mitigate contamination. Replace bearings, seals, o-rings & assembly screws. Rework the front shaft spanner holes. Adjust preload, balance, assemble and break in. Final quality control inspection.

DETAILED CAUSE OF FAILURE

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