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 MoreMiyano ABX Spindle Repair
The Miyano ABX series is a CNC turning center. It can come equipped with a grease lubricated and pulley driven spindle that is capable of running up to 5,000 rpm.
CHALLENGE
Our customer sent us this spindle because it was making out of spec parts. It was leaving chatter marks on the work piece. Upon inspection, we noted that the pulley tapered shaft journal had light scoring. The drive pulley had fretting and light scoring as well. Lastly, the bearings were worn and there was shaft nut damage. No other dimensional deviations were noted.
SOLUTION
The following actions were performed on this Miyano ABX spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, shaft nut, and assembly screws
- Manufacture a new pulley
- Grind, chrome plate, and finish grind the pulley taper on shaft
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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