This spindle came in with rear roller contamination, possibly from losing preload. It appears the rear nut capturing the rear roller bearing had loosened during operation causing lack of preload.
We replaced the bearings, made a new collet adaptor spacer as well as two new locking screws. The preload was adjusted, the spindle balanced assembled and broke in. The spindle was then thoroughly checked in our QC department and shipped back to the customer.
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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…