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 MoreJohnford DMC3100SH Spindle Repair
Email from our customer after the repair was completed:
Good morning NTE,
Thank you For helping us with our spindle! We greatly appreciate you and your companies service. I anticipated mid-next week for completion but you far exceeded that.
Many Thanks,
Michael
CHALLENGE
This Johnford DMC3100SH spindle was sent in for a full breakdown and evaluation. Upon disassembly, we found that the bearings felt rough and the grease was contaminated. The drawbar was stuck incoming, it had to be removed and cleaned to get force. We also noted that the gripper fingers, taper, and drive dogs were showing signs of wear. Lastly, the customer supplied a new rotary union assembly and tooling.
SOLUTION
The following actions were performed on this Johnford DMC3100SH spindle:
- Clean, inspect overall dimensions
- Replace bearings, belleveilles, grippers, screws, orings, and rear shaft nut
- Kiss grind the 50 taper
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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