Possible cause of failure:
Catastrophic failure of the #1 front bearing.
Front and rear housing bands are oversized and have a pre existing score mark.
Taper is out of ISO specification.
Seals are worn.
Gripper balls are worn.
Bolts are worn.
Clean, inspect overall dimensions.
Front and rear housing need grind plate grind.
Taper needs grind plate and finish grind.
Replace gripper balls, seals and bolts.
Adjust preload, balance, assemble and break in. Final quality control inspection.
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Catastrophic bearing failure was the main cause of this spindle malfunction
Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication…