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 GLS-2000 LYS Spindle Repair
The Yama Seiki GLS-2000 LYS is a high production CNC turning center. It comes fitted with a grease lubricated and stator driven spindle capable of running up to 4,500 rpm.
The first thing we noticed on this Yama Seiki GLS-2000 LYS spindle had bearings that were noisy when rotated by hand in assembly incoming. The stator (field) passed all incoming electrical testing and the front bearing housing cannot be accessed without removing the rotor from the shaft. This spindle has a very thin-walled rotor which is very susceptible to damage. Unfortunately this occurred during multiple attempts at removal. Lastly, our customer had sourced a complete spindle parts kit from the OEM. No dimensional deviations were noted for this repair.
The following actions were performed on this Yama Seiki GLS-2000 LYS spindle:
- Clean, inspect overall dimensions
- Complete assembley of customer-supplied spindle parts kit
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