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 MoreBridgeport VMC 760 Spindle Repair
The Bridgeport VMC 760 is a vertical machining center equipped with a spindle capable of running up to 6,000 rpm.
CHALLENGE
When this Bridgeport VMC 760 arrived at our facility, we completed a full breakdown and evaluation. Upon inspection, we noted that the front and rear bearings had failed due to contamination. The rear roller cage was broken and missing some rollers. It was also noted that the hydraulic nut that loads the rear roller had been milled. The drawbar force was low (1,465 lbs) incoming, minimum is 1,800 lbs. Lastly, the critical dimensions were measured and we noted that the taper and rear housing were out of ISO and will need to be addressed.
SOLUTION
The following actions were performed on this Bridgeport VMC 760 spindle:
- Clean, inspect overall dimensions
- Replace bearings, bellevilles, o-rings, gripper balls
- Manufacture a new hydraulic nut. Part cannot be purchase because part is obsolete
- Grind, chrome plate, and finish grind the rear housing
- Kiss grind taper
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.
Does your spindle need repair? GET A QUOTE TODAY
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.
Read More