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 MoreDMG MORI NLX 2500 Spindle Repair
The DMG MORI NLX 2500 is a CNC high production turning center. It comes equipped with a grease lubricated and stator driven spindle capable of running up to 6,000 rpm.
CHALLENGE
Our customer sent us this DMG MORI NLX 2500 spindle and indicated that the spindle had been bumped. The bearings were very noisy when rotated by hand incoming. Upon disassembly, it was noted that the #1 front bearing feels brinelled, no evidence of any contamination or wear debris. The #2 front bearing and rear roller were in good condition. No dimensional deviations were found (tooling ID/OD, housing bores, shaft bearing journals, and shoulders). The customer’s tooling adapter plate had ID/OD runout, possible mounting issue as shaft dimensions are good.
SOLUTION
The following actions were performed on this DMG MORI NLX 2500 spindle:
- Clean, inspect overall dimensions
- Replace all 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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