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
Stama NN3011-234411-40M Spindle Repair
This Stama NN3011-234411-40M spindle is grease lubricated and coupling driven, maiking it capable of running up to 5,100 rpm.
This spindle came to us from an automotive brake system manufacturer because it was faulting out the drive. Small wonder, as we could feel that the bearings were obviously in very poor condition when rotated by hand in assembly incoming. Upon disassembly, we discovered that the grease in the bearings was severely degraded from contamination with a fine black particulate, especially in the front of the spindle.
Fortunately for our customer, we did not find any significant dimensional deviations of the shaft or housing. We proceeded to rebuild the spindle with all new bearings, HSK gripper seal, 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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100,000 rpm Oil Mist Lubrication The tool to this spindle was broken off inside the pilot. After we extracted the remaining tooling we found the front bearing shoulder had 12 microns of run ou [...]
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