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
Hermle C800U Spindle Repair
The Hermle C800U is a 5-axis machining center. It can come fitted with this grease lubricated and gear driven Weiss spindle capable of running up to 15,000 rpm.
This Hermle C800U spindle was sent in to Northland Tool and Electronics for a full breakdown and evaluation. Upon arrival, the first thing we noted was that the bearings were noisy when rotated by hand in assembly incoming. After completing the breakdown and evaluation, we found that the front and rear bearings were heavily contaminated with coolant. We inspected all the critical dimensions, but found no unacceptable deviations on this spindle.
The following actions were performed on this Hermle C800U spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, and assembly screws
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