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 MoreOkuma Captain-L370M Spindle Repair
The Okuma Captain-L370M is a 3-axis CNC turning center. It can come equipped with this grease lubricated and stator driven spindle capable of running up to 3,500 rpm.
CHALLENGE
Our customer sent in this Okuma Captain-L370M spindle stating that the bearings were bad and it makes excessive noise at higher RPM. When the spindle arrived at Northland Tool and Electronics, we noted right away that the spindle was seized. After completely breaking down the spindle, we found that there was no grease left in the rear roller bearings and the front bearings were contaminated with a brown particulate. We then evaluated all critical dimension (bearing journals, housing, taper, etc.) and found that the front bearing shoulder had high run out. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Okuma Captain-L370M spindle:
- Clean, inspect overall dimensions
- Replace bearings, bolts, and o-rings
- Kiss grind the front shaft shoulder
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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