120,000 rpm

This Heald ID grinding spindle came in with end play and the pilot had 12 microns of run out. The spindle appears to have been crashed. The spindle required grinding; chrome plate and finish grind to the pilot. The replacement of the high-speed bearings requires perfect adjustment of the preload. If the preload is heavy the bearings will produce heat and fail. If the preload is light the balls of the bearings will “skate” causing vibration and ultimately failure. The final QC checks for this type of repair include preload checks and intensive vibration analysis to insure your spindle is in prime operating condition.

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Repair History - Here are examples of similar spindle repairs that may contain additional information that will help you. If you have additional questions, please contact us.