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 MoreMori Seiki NL2500 Spindle Repair
The Mori Seiki NL2500 is a horizontal lathe that is no longer in production. The NL2500 is known for its rigidity between the spindle and the tool turret for high production cutting. This specific spindle we repaired is grease lubricated, stator driven, and can run up to 6,000 RPM.
CHALLENGE
When this Mori Seiki NL2500 spindle arrived to Northland Tool and Electronics it felt extremely rough and scratchy when spun by hand. After breaking down the spindle rust was found on the shaft and under the stator indicating water or coolant contamination. Then the critical surfaces (bearing journals, bearing shoulders, taper, etc.) were measured and the front housing was in ISO standards, but was very egged and will need to be addressed. No other dimensional deviations on any critical surfaces were noted.
SOLUTION
The following actions were performed on this Mori Seiki NL2500 spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings
- Replace bearings
- Grind-Plate-Grind (GPG) front 130mm housing
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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