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 MoreMori Seiki Dura Turn Spindle Repair
CHALLENGE
Our customer informed us that their Mori Seiki Dura Turn spindle was generating excessive heat during operation and that the part quality deteriorated to the point they wanted to get it repaired. When the spindle arrived at Northland Tool and Electronics the shaft felt rough when turned by hand. Our evaluation showed that over time coolant had found its way into the front bearings and washed the grease out of them. This removes the lubrication from the bearings causing rolling element to bearing raceway contact and eventually bearing failure. We also inspected the labyrinth, shaft, and housings for damage or wear. There were no dimensional deviations found.
SOLUTION
The following actions were performed on this Mori Seiki Dura Turn spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings
- Replace bearings
RESULT
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.
DETAILED CAUSE OF FAILURE
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