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 MoreColombo RC73.22 Spindle Repair
The Colombo RC73.22 spindle is a motorized wood routing spindle. It is grease lubricated and capable of running up to 40,000 rpm.
CHALLENGE
Our customer sent in this Colombo RC73.22 spindle stating it would not release a tool. Unfortunately, the customer did not supply a tool so we were unable to test knock out incoming, but the actuator and both proximity sensors functioned properly. The spindle was also very noisy when spun by hand incoming. Upon disassembly, we noted that there was a severe failure of the rear bearings. The bearing OD’s spun in the housing causing damage. Lastly, the taper had high runout when measured bare shaft.
SOLUTION
The following actions were performed on this Colombo RC73.22 spindle:
- Clean, inspect overall dimensions
- Grind, chrome plate, and finish grind (GPG) the ID taper
- GPG the 42mm rear housing
- Replace bearings, o-rings, and assembly screws
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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