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
Pace Maker 4J02808028 Spindle Repair
This spindle has a Pacemaker motor manufactured by Louis-Allis and a cartridge spindle manufactured by Brown & Sharp. The Brown & Sharp spindle is grease lubricated and capable of running up to 3,300 rpm.
This Pace Maker 4J02808028 motorized spindle was sent to us for repair. Incoming tests showed that the bearings felt rough when spun by hand and when test run were very loud. Upon disassembly we found the bearings were slightly contaminated and would need to be replaced. After the spindle was fully apart we measured the critical dimensions (bearing journals, bearing shoulders, tapers, etc.) and found that the spindle OD taper run out was >6 microns.
The following actions were performed on this Pace Maker 4J02808028 spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings
- Replace bearings
- Kiss grind OD Taper
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
Spindle completely disassembled and ready for evaluation.
Front shaft journal and taper that needed a kiss grind. We grind these tapers in our on site grinding department to guarantee the best run out possible.
Stator of this spindle. We check stators for any electrical deficiencies to make sure your rebuilt spindle runs like new.
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