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
Prater Mega Hammer Mill Spindle Repair
The Prater Mega Hammer Mill is used in the food production industry to process materials into a fine powder.
During breakdown of this spindle we found that the front labyrinth ring had rubout damage and did not fit correctly on the front housing cover. The front housing cover was severely warped, causing the shaft to bind when the labyrinth ring was tightened. The 90mm front housing bore was severely worn and oversized by +20/+50µm (ISO = ±7.5µm).
The following actions were performed on this Prater Mega Hammer Mill spindle:
- Manufacture & install new front & rear housing covers
- Rework the damage to the front labyrinth ring
- Grind, chrome plate, and finish grind the 90mm front housing bore
- Replace bearings, seal, gasket, 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