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.
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Mazak Quick Turn 15M Spindle Repair
The Mazak Quick Turn 15M is a CNC turning center designed for compact spaces. It can come fitted with a grease lubricated and stator driven spindle capable of running up to 5,000 rpm.
CHALLENGE
This Mazak Quick Turn 15M spindle was seized incoming to Northland Tool and Electronics. During disassembly, we noted that there was a large amount of rust inside the front cover labyrinth. The front roller spacer had seized into the front cover and the rust had migrated into the bearing causing it to fail. There was a large amount of corrosion on the interior of the front of the shaft. We then measured the critical dimensions and found a few unacceptable deviations. First, the lathe taper and face had high runout when measured as just a bare shaft. Second, the front roller taper and shoulder had high runouts of 4-6µ. There were no other dimensional deviations to note for this repair.
SOLUTION
The following actions were performed on this Mazak Quick Turn 15M spindle:
- Clean, inspect overall dimensions
- Replace bearings, bolts, o-rings, and roll pin
- Kiss grind the front roller journal and shoulder
- Kiss grind the lathe taper and face
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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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.
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