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 MoreMatsuura Cublex-42 Spindle Repair
The Matsuura Cublex-42 is a 5 axis machining and turning center. It can come equipped with this grease injected and coupling driven spindle capable of running up to 20,000RPM.
CHALLENGE
Our customer sent in this Matsuura Cublex-42 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 but the bearings felt worn when spun by hand
- Rear roller catastrophically failed and the ball cage was destroyed (PIC 1)
- The break ring in the front made contact with the shaft and was out of round
- Grease in the front bearings had turned to a grey color (PIC 2)
- Retention nut on the draw bar was gauled and had to be machined off (PIC 3)
SOLUTION
The following actions were performed on this Matsuura Cublex-42 spindle:
- Replace bolts, O-rings, Bearings, Bellevilles, Air fitting, Grease injection lines, and Draw bar nuts
- Mount break ring to front cover and kiss grind out the high spots and bring it back to round
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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