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
Voumard VMX30 Spindle Repair
The Voumard VMX30 spindle is oil mist lubricated, stator driven, and capable of running up to 30,000 rpm.
Our customer indicated that their tech found two open legs on this Voumard VMX30 spindle. We could not confirm this, as the stator (field) passed all incoming electrical testing. The spindle bearings were noisy and felt rough when rotated by hand in assembly incoming. After disassembly and evaluation, we noted that we removed bearings with steel rolling elements which are barely rated for this spindles speed. The grease in the front bearing pair was contaminated and the bearings were approaching failure. Lastly, the front shaft nut was stuck on and had significant damage. No other dimensional deviations were noted (tooling pilot, bearing journals/shoulders, housing bores).
The following actions were performed on this Voumard VMX30 spindle:
- Clean, inspect overall dimensions
- Manufacture and install a new front shaft nut
- Component balance the shaft on the Schenck balancing system
- Upgrade all bearings to speed-rated hybrid ceramics
- Replace 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