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 MoreHitachi Seiki VS50 Spindle Repair
The Hitachi Seiki VS50 is a CNC vertical machining center that comes equipped with a grease lubricated and stator driven spindle. The spindle is capable of running up to 12,000 rpm for high speed cutting.
CHALLENGE
When this Hitachi Seiki VS50 spindle arrived at Northland Tool and Electronics we completed a full breakdown and evaluation. Upon inspection we found that there was a catastrophic failure of the #1 front bearing. The front and rear housing bands were oversized and have a pre existing score mark. The seals, gripper balls, and bolts were all worn. We measured the critical dimensions (bearing journals, housings, taper, etc.) and found that the taper was out of ISO specifications and will need to be addressed.
SOLUTION
The following actions were performed on this Hitachi Seiki VS50 spindle:
- Clean, inspect overall dimensions
- Replace bearings
- Grind, chrome plate, finish grind (GPG) the front and rear housing
- GPG tooling taper
- Replace gripper balls, seals, and bolts
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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