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 MoreMori Seiki Dura Turn Spindle Repair
CHALLENGE
Our customer informed us that their Mori Seiki Dura Turn spindle was generating excessive heat during operation and that the part quality deteriorated to the point they wanted to get it repaired. When the spindle arrived at Northland Tool and Electronics the shaft felt rough when turned by hand. Our evaluation showed that over time coolant had found its way into the front bearings and washed the grease out of them. This removes the lubrication from the bearings causing rolling element to bearing raceway contact and eventually bearing failure. We also inspected the labyrinth, shaft, and housings for damage or wear. There were no dimensional deviations found.
SOLUTION
The following actions were performed on this Mori Seiki Dura Turn 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
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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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