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 HSX 100-750005 Spindle Repair
The GMN HSX 100-750005 spindle is built for manual tool changes in the cutting tool manufacturing industry. This is a high speed spindle that is Oil lubricated, stator driven, and capable of up to 75,000 RPM.
CHALLENGE
This GMN HSX 100-750005 spindle arrived at Northland Tool and Electronics completely seized. Since no test run could be performed we moved on to a full disassembly of the spindle. During disassembly the front shaft nut was extremely difficult to remove and had to be cut off. It was then recorded that the front #1 and rear bearings had a brown particulate contamination and felt very worn. A complete inspection of the critical dimensions found that the front ID Pilot had 6μ of run out and the front bearing journal had 4μ of run out. Lastly, the front cover showed signs of uneven contact and rocked on a flat surface.
SOLUTION
The following actions were performed on this GMN HSX 100-750005 spindle:
- Clean, inspect overall dimensions
- Replace bearings, bolts, o-rings, and front shaft nut
- Grind, plate, grind (GPG) front ID pilot and front bearing journal
- Skim cut front cover
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.
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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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