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
Mazak Quick Turn 250 Spindle Repair
The Mazak Quick Turn 250 is a very popular CNC turning center. It comes equipped with a grease lubricated and pulley driven spindle capable of running up to 4,000 rpm.
Our customer sent in this Mazak Quick Turn 250 spindle for full breakdown and evaluation. Upon disassembly, we found that the bearings failed due to heavy coolant contamination. The bearing raceways were micro-machined by debris from the rolling elements. Lastly, the pulley drive key was rusted into the shaft. No dimensional deviations were noted on this spindle.
The following actions were performed on this Mazak Quick Turn 250 spindle:
- Clean, inspect overall dimensions
- Replace all bearings, pulley drive key, 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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Downtime is inevitable for any machine, but knowing how to reduce downtime or minimize its likelihood is critical.Read More