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
Makino A81 Spindle Repair
A contract manufacturer was installing their Makino A81 spindle when someone hit the X travel and jammed the spindle into the housing. The spindle was not entirely in the machine so damage did occur. When the spindle was pulled from the machine they found when the shaft was spun by hand the bearings sounded rough. They called Northland Tool and requested an expedited rebuild on their milling spindle.
Once we received this Makino A81 spindle, it was determined that the bearings would need to be replaced. We also found that the shaft taper was worn and would need to be ground. Lastly, we noted that the front nut was damaged and we would have to manufacture a new shaft spacer.
The following actions were performed on this Makino A81 spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings=
- Replace bearings
- Machine a new spacer and repair the front nut
- Kiss grind shaft taper
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