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 MoreExcello 550 Spindle Repair
CHALLENGE
When this Excello 550 spindle arrived at Northland Tool and Electronics we performed a full evaluation of the spindle. Upon disassembly, we found that the #4 bearing had failed from contamination. The rear journal sleeve was found to be cracked as well. We then measured the critical dimensions (bearing journals, housing, etc.) and found a couple unacceptable deviations. The front and rear housings were oversized and the pulley journals were undersized. Both will need to be put through our grinding process to be corrected.
SOLUTION
The following actions were performed on this Excello 550 spindle:
- Clean, inspect overall dimensions
- Replace bearings, bolts, and o-rings
- Replace rear journal sleeve
- Grind, chrome plate, and finish grind (GPG) the front bearing housing
- GPG the pulley journals
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.
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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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