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 More
Mori Seiki MV55-50 Spindle Repair
The Mori Seiki MV55-50 has been around for a long time. It is a vertical machining center with a belt-driven, 4,000 RPM, grease-lubricated spindle. This spindle also has a unique ceramic CAT-50 taper that was fortunately in good shape on this repair.
CHALLENGE
This customer called in and stated that their machine had gotten an extra amount of load and stopped running mid-job. They said that they were able to rotate the spindle by hand but it sounded noisy and decided to send the spindle in for evaluation. When the spindle arrived at Northland Tool and Electronics we were not able to rotate the spindle by hand and therefore could not replicate the issues they described. After disassembling the spindle, it was found that there was coolant throughout the spindle and the rear roller bearing had catastrophically failed. The cage of the roller bearing was destroyed and some rolling elements were missing. The grease in all the bearings was severely degraded and was a sludgey black mixture of grease, oil, and coolant. The critical dimensions (bearing journals, housing, taper, etc.) were measured and there were no deviations to note of on this spindle.
SOLUTION
The following actions were performed on this Mori Seiki MV55-50 spindle:
- Clean all parts of the spindle
- Replace all bolts and o-rings
- Replace bearings
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
Does your spindle need repair? GET A QUOTE TODAY
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.
OD grinding — or outside diameter grinding — is a cornerstone of precision manufacturing, where exact specifications and flawless surface finishes are essential.
Read More