Chiron Spindle Rebuild
Our evaluation of this spindle showed fretting on the OD of the front bearings. We do not receive the housings with Chiron repairs as the spindle can be removed as a shaft and bearing assembly. After checking the housing in the machine it was determined that they should remove it and send it to us for a grind plate grind. Northland Tool always tries to find the route cause spindle failure and help our customers with recommendations that will help make their spindles last longer.
Possible cause of failure:
#1 front bearing failure due to fatigue or possibly a crash.
All bearings show fretting corrosion on OD.
Tennon rod was sticking due to fretting from not being lubricated.
Taper and face showing signs of wear. The chrome is starting to chip on the face chamfer.
Clean, inspect overall dimensions.
Replace bearings,quad seals and o-rings.
Replace drive dog.
Clean tennon rod and use anti-seize grease.
Grind, chrome plate and finish grind the hsk 63 taper.
Adjust preload, balance, assemble and break in. Final quality control inspection.
**Customer should check their housings for wear. The bearing OD shows signs of fretting.
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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…