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
Yama Seiki BM-2100 Spindle Repair
The Yama Seiki BM-2100 is a high production CNC vertical machining center. It can come equipped with a grease lubricated and gear driven spindle capable of running up to 6,000 rpm.
This Yama Seiki BM-2100 spindle was seized when it arrived at Northland Tool and Electronics. Upon disassembly and evaluation, we noted that the grease in all the bearings had been washed out by coolant. The front bearing pair suffered a catastrophic failure, the cages were destroyed. Lastly, the coolant inlet of the rotary union had damaged threads. No significant dimensional deviations were noted (tooling taper, bearing journals/shoulders, housing bores) for this repair.
The following actions were performed on this Yama Seiki BM-2100 spindle:
- Clean, inspect overall dimensions
- Replace full bearing complement, bellevilles, rotary union, 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