C&M PU2116 Spindle Repair

Our customer’s process creates an abundance of small chips that are difficult to remove from the spindle during the manufacturing process due to the geometries of the parts they manufacture. These chips work their way into the space between the spindle shaft and housing, and over time rub the rotating parts damaging the spindle. We have been able to extend the spindle life considerably through proper repair practices. We replace the worn parts of the spindle with parts manufactured in our machining and grinding departments making sure the tolerances are as tight as possible to decreasing the possibility of chips getting into areas where they could damage parts.

CHALLENGE

This C&M PU2116 spindle arrived to our facility completely seized.  Upon inspection, we noted that metal pieces from the customer’s machining process had worked their way in between the housing and shaft causing it to lock up.  The front housing was heavily damaged as well.  Lastly, the front and rear seal surfaces were worn.  No other dimensional deviations were noted for this repair.

SOLUTION

Details of repair:

•   Clean, inspect overall dimensions
•   Replace bearings, ball thrust, needle roller, and seals
•   Grind chrome plate and regrind (GPG) the rear journal and the front seal surface
•   GPG the actuator shaft
•   GPG the front and rear housings

RESULT

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.