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 MoreHAAS EC-400 Spindle Repair
The HAAS EC-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 HAAS EC-400 spindle for repair stating the spindle was noisey. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- The spindle was difficult to rotate by hand incoming
- Rear bearings fretted against the rear housing and that material got into the rear bearings (Pic 1 and 2)
- Front bearings had no grease left in them and the #1 bearing ball cage disintegrated
- ID Taper had high run out
- Front shoulder had high run out
SOLUTION
The following actions were performed on this HAAS EC-400 spindle:
- Replace bolts, o-rings, bearings, belleville’s, and gripper balls
- Kiss grind ID 40 Taper and 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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