The front bearings on this spindle lost preload causing the spacer to spin. This galled the shaft. The front taper had been ground plate ground in the past and the chrome was chipped.
We ground plate ground the taper removing the old chrome and replacing it with new. We ground plate ground the front spacer and shaft to repair the damage. Once the dimensional work was completed in our grinding department the spindle was rebuilt in our clean room. It then was broken in and test run at 12,000 rpm.
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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…