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 MoreMilltronics ML18 Spindle Repair
The Milltronics ML18 is a large CNC tool room lathe. It comes fitted with a grease lubricated and pulley driven spindle that is capable of running up to 2,600 rpm.
CHALLENGE
This Milltronics ML18 spindle was extremely rough and hard to turn by hand incoming. Upon disassembly and inspection, we found that the all the bearings had brown particulate contamination.
The front and rear roller bearings were both heavily contaminated with the brown particulate. Lastly, the front OD taper and face had slightly high run out (2-4 microns) and look very poor cosmetically. There were no other dimensional deviations.
SOLUTION
The following actions were performed on this Milltronics ML18 spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, and assembly screws
- Kiss grind the front OD taper and face
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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