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 MoreDoosan VCF850SR Spindle Repair
The Doosan VCF850SR is a full 5-axis CNC machining center. It can come equipped with this oil mist lubricated and stator driven spindle capable of running up to 18,000 RPM.
CHALLENGE
Our customer sent in this Doosan VCF850SR spindle already disassembled. We completed a full evaluation of the parts and noted we were missing the middle ID bearing spacer and the bearings from the front quad set. During the evaluation we measured all the critical dimensions and found that the spindle taper failed our air gauge testing. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Doosan VCF850SR spindle:
- Clean, inspect overall dimensions
- Replace bearings, bolts and o-rings
- Grind, plate, grind (GPG) the 40 ID tooling taper
- Manufacture bearing spacer
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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