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 MoreHyundai VX-400 Spindle Repair
The Hyundai VX-400 is a CNC vertical machining center. It can come equipped with this grease lubricated and coupling driven spindle capable of running up to 12,000RPM.
CHALLENGE
Our customer sent in this Hyundai VX-400 spindle stating the spindle had been in service since 2007 and was getting noisey when speeding up. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Gripper post was heavily damaged and we were unable to take incoming draw bar force
- Front and rear bearings were contaminated with a brown sludge from use over the years (Pic 1)
- Front shoulder had high run out
- ID 40 taper measured AT wrong on our air gauge system
SOLUTION
The following actions were performed on this Hyundai VX-400 spindle:
- Clean, inspect overall dimensions
- Replace bolts, o-rings, bearings, gripper post, gripper fingers, and bellevilles
- Grind – Plate – Grind ID 40 taper due to poor air gauge reading
- Kiss Grind front shoulder due to high run out
RESULT
After reassembly of all components and adjusting bearing preload 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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