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 MoreHardinge Bridgeport GX 300 Spindle Repair
The Hardinge Bridgeport GX 300 is a compact CNC vertical machining center. It comes fitted with a grease lubricated and belt driven spindle capable of running up to 7,080 rpm.
CHALLENGE
This Hardinge Bridgeport GX 300 spindle was received without drawbar. The rear nut was loose and pulley slid back towards rear. Assembled runout in the taper was bad at 8-10µ, with low dips in taper. There were 4 broken screws in the rear of the spindle shaft that will need to be removed. Fortunately, the grease in all the front bearings looked new and the bearings felt good. The rear roller however, had some internally formed particulate contamination and the grease was discolored. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Hardinge Bridgeport GX 300 spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings, and assembly screws
- Remove broken bolts in rear of spindle shaft
- Kiss grind taper ID
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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