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 MoreMatsuura ES-800V PC2 Spindle Repair
The Matsuura ES-800V PC2 is a CNC vertical machining center made for 3-axis machining. It comes equipped with a grease lubricated spindle capable of 12,000 rpm and a CAT 40 taper.
CHALLENGE
When this Matsuura ES-800V PC2 spindle arrived at Northland Tool and Electronics we found a catastrophic rear roller bearing failure of the likes we have never seen before. First, the rear housing was 30 microns tight, tapered, and egged. Second, the #2 bearing failed and the cage was broken from the stress of no rear bearing. Third the taper was worn and had 6 microns of run out. Lastly, the rear shoulder on the shaft was damaged from the rear bearing failure.
SOLUTION
The following actions were performed on this Matsuura ES-800V PC2 spindle:
- Clean, inspect overall dimensions
- Replace bearings, bolts, and o-rings
- Kiss rear housing to remove tightness, taper, and egg
- Grind, plate, and finish grind the 40 taper to BIG PLUS specifications
- Kiss grind rear shaft bearing shoulder
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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