Hertlein Spindle Repair
This spindles front taper had worn to the point of needing a grind plate grind to bring it back to OEM specifications. The rear taper had run out but we were able to kiss grind it true. After we completed the work in our grinding department we manufactured replacement drive pins and assembled the spindle in our clean room. It was then broken in fully and test run at its maximum running speed. Vibration readings were taken and compared to our final QC criteria. All run out were check and passed. The spindle was then shipped to our customer.