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 MoreFeeler VB-2200 Spindle Repair
The Feeler VB-2200 is a CNC vertical machining center. It can come fitted with this grease lubricated and gear driven spindle that is capable of running up to 6,000RPM.
CHALLENGE
Our customer sent in this Feeler VB-2200 spindle stating that the spindle was seized. Once the spindle arrived at Northland Tool we completed a full disassembly and evaluation.
This is what we found:
- Both of the gear wheels showed signs of chattering, customer might want to look at the machine gears (Pic 1)
- Coolant contaminated the bearings and the #3 bearing catastrophically failed due to lack of grease (Pic 2)
- All of the front bearing spacers were damaged from bearing failure
- ID 50 taper had high run out and failed on the air gauge
- The grippers were heavily worn
SOLUTION
The following actions were performed on this Feeler VB-2200 spindle:
- Replace Bolts, O-rings, Bearings, Grippers/post, and Bellevilles
- Grind-Plate-Grind (GPG) ID 50 taper due to high run out and failing on the air gauge
- Have customer check out the gear wheels in their machine for chattering damage
- Fix damage to front spacers in machining
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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