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 MoreHardinge LC-1220 Spindle Repair
The Hardinge LC-1220 is a spindle from a Hardinge lathe. This spindle is grease lubricated, belt driven, and capable of running up to 5,000 rpm.
CHALLENGE
Our customer sent us this Hardinge LC-1220 spindle because it started to make noise and they knew failure was not far away. We disassembled the spindle and found contamination in the bearings from normal usage. We also noted that the collet locating surface had 5 microns run out, the face had 4 microns run out, and the OD had 5 microns of run out. The front and rear nuts had been damaged and needed repair as well. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Hardinge LC-1220 spindle:
- Clean all parts of the spindle
- Replace bearings, o-rings, and assembly screws
- Manufacture a new spacer for the pulley
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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