The Bridgeport Torq-Cut 22 is a smaller CNC vertical machining center. It comes fitted with a grease lubricated and belt driven spindle capable of running up to 7,500 rpm.
Read MoreOkamoto ACC 32-80EX Spindle Repair
The Okamoto ACC 32-80EX is a larger CNC surface grinder. This specific spindle is a coupling driven, grease-lubricated spindle that can run up to 1,100 RPM.
CHALLENGE
Customer sent in this spindle stating that it was noisy. Upon arriving to Northland Tool and Electronics it was hard to spin by hand and had a little bit of noise. After disassembling the spindle it was found that there was coolant/water on the shaft and in the housing. The bearings had corrosion built up on the balls and the grease had degraded from the coolant/water contamination. All four bearings felt scratchy when turned by hand and were the main reason for this repair. There were no significant dimensional deviations on any critical surfaces (bearing journals, bearing shoulders, housing, etc.)
SOLUTION
The following actions were performed on this Okamoto ACC 32-80EX spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings
- Replace bearings
- Re-apply Gasket Maker to rear cover
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
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More Case Studies
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.
It’s a fact of machining — eventually, even top-of-the-line turning machines will experience a spindle failure. Spindles endure tension, torsion, heavy loads, and speeds up to and beyond 150,000 RPM, to name a few of the standard stressors.
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