Possible cause of failure:
Front bearings cage is broken – failure from long use and contamination. Taper has 6 microns of runout. Inner spacer spun on the shaft damaging shaft journal and spacer. Broken bellevilles and drawbar worn
Clean, inspect overall dimensions. Kiss grind taper Grind, chrome plate & regrind shaft journal Manufacture a new bearing spacer Replace bearings and seals. Replace bellevilles. 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…