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 MoreKitamura Mycenter-3XG Spindle Repair
The Kitamura Mycenter-3XG is a CNC vertical machining center. It can come equipped with this grease lubricated and coupling driven spindle capable of running up to 15,000RPM.
CHALLENGE
Our customer sent in this Kitamura Mycenter-3XG spindle for repair due to the spindle failing twice from comeptitor repairs. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Spindle rotated freely but the bearings felt worn when spun by hand
- Actuator funtioned properly and the drawbar had very high force
- There was hydraulic fluid throughout all the bearings and the grease had been washed out (Pic 1)
- ID Big Plus 40 taper measured poorly with our Big Plus gauge
SOLUTION
The following actions were performed on this Kitamura Mycenter-3XG spindle:
- Replace bolts, o-rings, bearings, bellevilles, and seals.
- Grind-Plate-Grind ID BP 40 taper
RESULT
After reassembly of all components and adjusting bearing preload 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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