After breaking down this spindle to clean and inspect the overall dimensions we determined that the cause of failure was contaminated front and rear bearings.
The front housing was egged with 7 microns of runout and was tapered.
We repaired this Jung surface grinder by replacing the bearings. We ground plated and reground the front housing in addition to our standard repair process.
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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…