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 DMC 3100SH Spindle Repair
The Johnford DMC 3100SH is a very large CNC bridge mill. It comes equipped with a grease lubricated and pulley driven spindle capable of running up to 6,000 rpm.
CHALLENGE
Our customer called in with this spindle failure and they wanted help extending the life of their spindles. After visiting their facility to evaluate their process and machine we determined that the rear bearings were failing. The rotary union was leaking into the rear of the spindle and contaminating the rear bearing. We also noted that the taper was worn and would need a kiss grind for correction.
SOLUTION
The following actions were performed on this Johnford DMC 3100SH spindle:
- Clean, inspect overall dimensions
- Replace all bolts and o-rings
- Replace front bearings
- Upgrade rear bearings to sealed to eliminate contamination
- Kiss grind 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.
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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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