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……Read More
Boneham & Turner GS6580 Spindle Repair
The Boneham & Turner GS6580 is a high speed grinding spindle. It is grease lubricated, pulley driven, and capable of running up to 28,000 rpm.
This Boneham & Turner GS6580 spindle was difficult to rotate by hand, therefore no incoming runout could be taken. During disassembly, we noted that all of the bearings separated during breakdown. Once the breakdown was completed, we noted that the bearings were contaminated with a brown particulate. The spindle was then evaluated and the critical surfaces were measured. We found that both the front and rear bearing journals had deviation and will need to be ground. Lastly, the ID taper had high run out and will need grinding as well.
The following actions were performed on this Boneham & Turner GS6580 spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, and assembly screws
- Grind, chrome plate, and finish grind (GPG) the front ID Taper
- GPG the front and rear bearing journals
After reassembly of all components, adjusting bearing preload, and undergoing break-in and testing procedures, this spindle passed our final quality inspection before being returned to our customer with a 1-year warranty.
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Running this spindle too long caused deformed ball bearings and damage to the outer race Damage to the outer race is consistent with prolonged operation after spindle exhibited initial signs of needing to be rebuilt Every spindle rebuilt by North…Read More