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 MoreBrown & Sharpe #5 Spindle Repair
The Brown & Sharpe #5 is a manual grinding machine. This spindle is grease lubricated and belt driven, making it capable of running up to 1,875 rpm.
CHALLENGE
This Brown & Sharp #5 spindle was very noisy when spun by hand incoming. During disassembly, the front nut was rusted to the shaft and extremely difficult to remove. Upon inspection of the spindle, we noted that the front cover was heavily rusted and corroded and should be remade. The bearings were contaminated with particulate and the grease had begun to wash out and turn into a black sludge. Lastly, the spanner holes were damaged from removal and will need to be welded and redrilled. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Brown & Sharpe #5 spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, and assembly screws
- Manufacture a new front cover
- Weld and redrill front shaft nut spanner holes
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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