Gleason GTR250 Spindle Repair

Gleason GTR250 Spindle Repair

A manufacturer of gears sent us this Gleason GTR250 5 axis 5,000 rpm gear chamfering spindle. Their complaint was the 40 taper was pitted and would not hold the tool accurately.


Incoming inspection of this Gleason GTR250 showed 35 microns of run out in the taper. The grease in the front bearing was washed out, and the rear bearings were contaminated.  Lastly, the shaft rear journal was under sized and the rear housing was over sized.



The following actions were performed on this Okuma MC-V4020 spindle:



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.


  • Gleason GTR250 Spindle Repair

    Rear bearing contamination

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