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 MoreEverite TC1C Spindle Repair
The Everite TC1C is a grinding spindle that is grease lubricated and belt driven capable of running up to 3,000RPM.
CHALLENGE
Our customer sent in this Everite TC1C spindle stating that they noticed some endplay with the spindle. 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 very worn when spun by hand
- Rear bearing had a slight brown particulate contamination
- Front bearings were heavily contaminated with a brown particulate (Pic 1)
- Front OD Pilot had high run out and deviation
- Front bearing journal was past ISO on the lower side at -7µ
SOLUTION
The following actions were performed on this Everite TC1C spindle:
- Replace bolts, bearings, and wear items
- Grind-Plate-Grind (GPG) front housing due to egg and out of ISO
- GPG front bearing journal due to low deviation
- GPG front OD pilot due to run out and deviation
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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