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 MH-63 Spindle Repair
The Mori Seiki MH-63 is a CNC horizontal machining center with a built in double pallet changer. It is fitted with an oil mist lubricated spindle capable of running up to 6,000 rpm.
CHALLENGE
When this Mori Seiki MH-63 spindle arrived at Northland Tool and Electronics we noticed right away that the bearings sounded scratchy when spindle was rotated by hand. After breaking down the spindle we confirmed that the bearings felt rough when manipulated. The taper coolant plunger assemblies were missing valve guides, check valves, and springs. We noted that the removable drive dogs had light wear, but the gripper fingers were in good condition.
SOLUTION
The following actions were performed on this Mori Seiki MH-63 spindle:
- Clean, inspect overall dimensions
- Replace bearings, oil lines, and ferrules
- Replace coolant plunger assemblies, drawbar balls, o-rings, 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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