Possible cause of failure:
Front bearings had catastrophic failure, cages are broken.
Rotary union ceramic button was cracked, allowing coolant into the spindle.
Bellevilles are worn. O-rings are worn.
Clean, inspect overall dimensions.
Replace bearings, o-rings, and bellevilles
Customer supplied new rear bearing (we will not install.)
Adjust preload, 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…