Motor City Machine Tool specializes in GMN spindle repair for CNC machine tools
such as: HMCs, VMCs,  and Grinding Machines.  

We replace and in stall new: precision bearings, seals, o-rings, and all damaged components.
All components are tested:  Motor  winding, drawbars, encoders, and Vibration Analysis is
performed on all spindle bearing.


All GMN Spindle Repairs are test run to maximum rpm
GMN Spindles are initially ran at 5% of maximum speed.
Bearing Temp & vibration are checked.  Once verified to be with  OEM specs,
the rpm is increased to 10% of max. rpm.
All spindle units are checked before & during the increase of rpm at all intervals
Once they are proven to be within OEM specs they are increased by 10% intervals
of the max rpm until achieved.
When max rpm is achieved the spindle is ran for 1-2 hours
Bearings are monitored for velocity and displacement
Only when bearing temperatures & the vibration analysis readings are within OEM spec is
the unit approved for shipment.



Lead Times                                                                Warranty
1-3 Days for Emergency Repair                                 All Toyoda Spindle Repairs have a
1-2 Weeks Standard Repair                                        full 1 year warranty.
GMN Spindle Repair
Sales@motorcityrepair.com

32535 Schoolcraft Rd
Livonia, MI 48150
(734) 261-8600  Office