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 MV40 Spindle Repair
The Mori Seiki MV40 is a CNC vertical machining center. It can be fitted with a spindle like this one that is oil mist lubricated, stator driven, and capable of running up to 12,000 rpm.
CHALLENGE
This Mori Seiki MV40 spindle was sent in for a full breakdown and evaluation. Upon disassembly and inspection, we noted that there was damage to the shaft taper, 1 broken drive dog, and 1 missing drive dog. The coolant plungers for the taper were worn and will need to be replaced. The taper face had a crack and was bellmouthed and the front and rear journals were undersized. Lastly, the taper nose rubbed out on the front cover. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Mori Seiki MV40 spindle:
- Clean, inspect overall dimensions.
- Replace bearings, drive dogs and coolant plungers.
- Machine taper bellmouth and crack and then grind, chrome plate, and finish grind
- Grind, chrome plate, and finish grind the front and rear shaft journals
- Kiss grind front cover
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.
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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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