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 MoreHeian M8808 Spindle Repair
The Heian M8808 is a CNC routing spindle. It is an oil mist lubricated and stator driven spindle capable of running up to 17,000RPM.
CHALLENGE
Our customer sent in this Heian M8808 spindle due to premature tooling failure. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Spindle rotated freely but the bearings felt worn when spun by hand
- Front bearing journal was heavily worn and had high run out
- Front housing was egged at +6µ/-2µ
- Front bearings were brinelled
- Front shaft threads were damaged
- Id collet taper had high run out
SOLUTION
he following actions were performed on this Heian M8808 spindle:
- Clean, inspect overall dimensions
- Replace bolts, o-rings, and bearings
- Grind-Plate-Grind (GPG) front 35mm bearing journal
- GPG front 62mm housing
- Fix damaged front shaft threads
- GPG ID collet taper
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.
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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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