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 RC135 Spindle Repair
The Colombo RC135 is a CNC wood routing spindle. It can come fitted with this grease lubricated and motor driven spindle that is capable of running up to 24,000 rpm.
CHALLENGE
Our customer sent in this Colombo RC135 spindle for repair. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Spindle rotated freely incoming.
- Ohms tested inconsistent between wire leads
- Front ID Taper was very rough, pitted, and measured 4µ runout (Pic 1)
- Front locking nut threads were swelled, had to machine threads for removal
SOLUTION
The following actions were performed on this Colombo RC135 spindle:
- Clean, inspect all dimensions
- Replace bolts, o rings, bearings
- Grind – Plate – Grind front shaft ID taper
- Have field rewound
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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