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 SH400 Spindle Repair
The Mori Seiki SH400 is a CNC horizontal machining center. It can come fitted with this oil mist lubricated and stator driven spindle that is capable of running up to 12,000 rpm.
CHALLENGE
This Mori Seiki SH400 spindle was sent in for a full breakdown and evaluation. After inspecting the critical components, we noted that the front bearings failed from coolant contamination. The #1 bearing had the most contamination. It was also noted that the shaft taper was bell mouthed and the drive dogs have slight cosmetic wear. Lastly, the splash ring and coolant plunger assemblies were worn. No other dimensional deviations were noted for the repair.
SOLUTION
The following actions were performed on this Okuma MC-V4020 spindle:
- Clean, inspect overall dimensions
- Grind, chrome plate, and finish grind the taper
- Replace bearings, o-rings, oil line, splash ring, 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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