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 MoreMazak QTS 350M Spindle Repair
The Mazak QTS 350M is a high production CNC turning center. The “QTS” stands for Quick Turn Smart and the “M” indicates that the machine comes equipped with milling capabilities. The spindle we repaired here was the tail stock spindle which is grease lubricated and capable of running up to 3,300 rpm.
CHALLENGE
This Mazak QTS 350M spindle was seized when it arrived at Northland Tool and Electronics. After a full breakdown and evaluation, we found that the front roller bearing was heavily contaminated with a brown particulate and rust. The rear bearings were also contaminated with a brown particulate. No dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Mazak QTS 350M spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, and assembly screws
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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