Guiliani-EMP-Spindle-Repair

Giuliani EMP-25-3000-14289 Spindle Repair

The retaining cage of the front bearing in this spindle was compromised by coolant contamination. This allows the balls of the bearing to stack up on each other causing failure. Fortunately for our customer they removed the spindle from service before catastrophic failure happened. This saves on spindle repair costs and lead time.

 



CHALLENGE

This Giuliani EMP-25-3000-14289 spindle arrived at Northland Tool and Electronics for a full breakdown and evaluation.  Upon inspection it was found that the front bearings failed due to contamination.  We also measured the front pilot and it had 8 microns of runout.

 

SOLUTION

The following actions were performed on this Giuliani EMP-25-3000-14289 spindle:

  • Clean all parts of the spindle
  • Replace all bolts and o-rings
  • Replace bearings

 

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

  • Contaminated front bearing set. Notice the broken bearing cage in the number one bearing.

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