This spindle was pulled by our customer because it started “growling” when it was run. The front bearing was close to failure. This may have been caused by bearing overload or the bearings reached the end of their service life. Northland Tool & Electronics refurbished this spindle and it is in the machine running as good as new.
Possible cause of failure:
Spindle bearings sound bad when spun by hand.
#1 front bearing is bad, grease looks clean in #2.
Drive dogs have light wear (we will use them as is)
Grippers are good.
Taper is worn.
Clean, inspect overall dimensions.
Replace bearings, bellevilles, and orings.
Kiss grind the taper.
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…