Pibomulti-spindle

Pibomulti X635T Spindle Repair

The Pibomulti X635T is a CNC speeder attachment.  This is used to increase the speed of the cutting tool when your machine can’t match the performance needed.  This specific spindle is grease lubricated and capable of running up to 30,000 rpm.



CHALLENGE

This Pibomulti X635T spindle spun good incoming, but had very high runout in the pilot taper ID.  After disassembly and evaluation, we noted that there was a good amount of coolant found inside the housing. This coolant contamination had washed out the grease from the bearings.  Lastly, the housing was oversized just out of ISO and the shaft was undersized just out of ISO.  No other dimensional deviations were noted for this repair.

 

SOLUTION

The following actions were performed on this Pibomulti X635T spindle:

  • Clean, inspect overall dimensions
  • Replace bearings, o-rings, seal, and assembly screws
  • Will use housing and shaft as is
  • Kiss grind pilot taper ID in assembly

 

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.

DETAILED CAUSE OF FAILURE

  • Rotating parts laid out for evaluation

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