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 MoreGMN TSEV-100SDU Spindle Repair
The GMN TSEV-100SDU is an electric driven and grease lubricated grinding spindle capable of running up to 5,000 rpm.
CHALLENGE
This GMN TSEV-100SDU spindle arrived at Northland Tool and Electronics where we completed a full breakdown and evaluation. Upon disassembling the spindle, we found that the #1 and #2 front bearings were worn. The critical dimensions (bearing journals, taper, housing, etc.) were then measured and we found a couple issues. First, the taper had 12-14 microns runout. Second, the face had 6 microns runout. Because of the issues that we found after evaluation, we believe the spindle may have been crashed.
SOLUTION
The following actions were performed on this GMN TSEV-100SDU spindle:
- Clean, inspect overall dimensions.
- Replace bearings, o-rings, and assembly screws
- Replace grippers
- Grind, chrome plate, and finish grind the HSK 40 taper
- Kiss grind the face
- Manufacture a new brass nose ring
RESULT
After reassembly of all components, adjusting bearing preload, and undergoing break-in and testing procedures, 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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