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
Brown & Sharpe #13 Spindle Repair
The Brown & Sharpe #13 is a universal tool and cutter grinder. It comes standard with a grease lubricated and belt driven spindle capable of running up to 3,600 rpm.
Our customer sent this Brown & Sharpe #13 spindle in stating the threads in the pilot were damaged. The OD taper tool did have damaged threads incoming. We test ran the spindle incoming and found it had extremely high acceleration readings, meaning the bearings were compromised. Upon disassembly, we found that there was heavy contamination throughout the interior of the spindle. Both bearing journals were undersized and out of ISO. The bearing races would slide on and off by hand. Also both the front and rear OD tapers had slightly high runout and uneven contact. Lastly, there was an o-ring in between the front cover and the #1 bearing and this should be a steel spacer. No other dimensional deviations were noted for this repair.
The following actions were performed on this Brown & Sharpe #13 spindle:
- Clean, inspect overall dimensions.
- Replace bearings, o-rings, and assembly screws
- Manufacture replacement front spacer
- Grind, chrome plate, and finish grind (GPG) the front and rear 30mm journals
- GPG front and rear 55mm housings
- Kiss grind front and rear OD tapers
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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