Jagura Spindle Repair

50,000 RPM 

This customer sent in a Jagura spindle for repair as it was no longer providing them with the part finish they desired. Our evaluation found the front bearings were contaminated causing bearing failure. The tooling taper had 10 microns of run out and the pulley taper had 4 microns of run out. All these are factors contributed to the poor part finish.

We were able to kiss grind the shaft for the spindle repair on one of our Kellenburger grinders. The parts were cleaned and the spindle was assembled in our clean room. We test ran the spindle at the increased speed rating and trim balanced it. All run outs were checked and a final vibration analysis performed. 

As an upgrade we recommended replacing the stock steel bearings with ceramic bearings. This allowed them to increase the spindle speed and increase the lifespan of the spindle.