GMN TS70CX115 Spindle Rebuild

GMN TS70CX115 Spindle Repair by Northland Tool

GMN TS70X115, 10000 RPM, grease bearing lubrication, belt drive

This double-ended grinding spindle was making noise in the customer’s Walter grinding machine so they sent it in for evaluation & quoting. They stated that they were interested in an expedited turn time as they do not stock spare spindles for their grinding machines.



CHALLENGE

GMN TS70X115, 10000 RPM, grease bearing lubrication, belt drive This double-ended grinding spindle was making noise in the customer’s Walter grinding machine so they sent it in for evaluation & quoting. They stated that they were interested in an expedited turn time as they do not stock spare spindles for their grinding machines.

SOLUTION

When the spindle arrived and was rotated by hand, the bearings were very noisy. Upon breakdown it was apparent that the grease in both pairs of bearings had been degraded from contamination and use. Our dimensional inspection also showed evidence of wear to both OD tapers causing runout. Our customer approved the quote with the expedited turn and that same day we proceeded to kiss grind both OD tapers on one of our Kellenberger grinders to correct the runout. We then rebuilt the spindle the next day with all new ceramic bearings both front & rear.

RESULT

Once we test-ran the spindle and broke in the new Kluber NBU-15 grease in the bearings, the spindle was shipped overnight back to our customer, having spent less than 72 hours in our facility.

DETAILED CAUSE OF FAILURE

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