Hermle C800U Spindle Repair

Our customer sent in a Hermle 5 axis spindle for repair. They supplied the bearings. They had repaired it themselves 6 months ago. After experiencing such a short spindle life they decided to have it done properly by us.

We determined that there was contamination in both the front and rear. We replaced the bearings. The cause of the premature failure was the rear spacer was not within specifications causing extreme loading to one side of the bearing and low preload to the other. This condition if left unrepaired causes the bearings to wear heavily on one side and the rolling elements to “flutter” on the other. This customer paid our expedited fee and had it back in 3 days.