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 MorePrater Mega Hammer Mill Spindle Repair
The Prater Mega Hammer Mill is used in the food production industry to process materials into a fine powder.
CHALLENGE
During breakdown of this spindle we found that the front labyrinth ring had rubout damage and did not fit correctly on the front housing cover. The front housing cover was severely warped, causing the shaft to bind when the labyrinth ring was tightened. The 90mm front housing bore was severely worn and oversized by +20/+50µm (ISO = ±7.5µm).
SOLUTION
The following actions were performed on this Prater Mega Hammer Mill spindle:
- Manufacture & install new front & rear housing covers
- Rework the damage to the front labyrinth ring
- Grind, chrome plate, and finish grind the 90mm front housing bore
- Replace bearings, seal, gasket, 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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