Mori Seiki SV-500 Spindle Drive Dog Replacement



CHALLENGE

Possible cause of failure: Shaft tooling taper is worn and has been previously sleeved & pinned. Both integral drive dogs have heavy damage. Some evidence of coolant contamination in spindle, coolant ports are full of sludge & debris. Coolant nozzle blocks are contaminated and have corroded, worn & broken springs & balls.

SOLUTION

Recommended action: Clean, inspect overall dimensions. Kiss grind shaft tooling taper. Mill off drive dogs, drill & tap new location for removable drive dogs, manufacture new drive dogs. Replace bearings, push-connect fittings, balls, springs, o-rings & assembly screws. Adjust preload, balance, assemble and break in. Final quality control inspection.

DETAILED CAUSE OF FAILURE

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