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 MoreHwacheon Hi-Tech 250A Spindle Repair
The Hwacheon Hi-Tech 250A is a CNC turning center. It can come equipped with this grease lubricated and stator driven spindle capable of running up to 5,000RPM.
CHALLENGE
Our customer sent in this Hwacheon Hi-Tech 250A spindle stating the spindle was making a wierd noise. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Spindle rotated freely but bearings felt worn when spun by hand
- There was contamination in the labyrinth system
- Ball cage started to deteriorate in the #1 and #2 bearings and particles of the ball cage
contaminated the grease (Pic 2) - Third and Fourth bearings were contaminated with a brown particulate (Pic 1)
- Face and OD Taper had good contact and runout
SOLUTION
The following actions were performed on this Howa MSN-500H-VC spindle:
- Clean, inspect overall dimensions
- Replace bolts, o-rings, and bearings
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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