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 MoreHeald Red Head 407 Spindle Repair
This Heald Red Head 407 comes fitted with oil mist lubrication, is belt driven, and is capable of running up to 17,500 rpm.
CHALLENGE
This Heald Red Head 407 spindle was seized when it arrived at Northland Tool and Electronics. Upon disassembling the spindle, we found that the #1 front bearing catastrophically failed. The cage was cracked and the debris front the #1 bearing contaminated the front pair. It was also noted that the tooling pilot face had several high spots and the drive pulley taper OD had a light ding. No other dimensional deviations were noted for this repair. The drive pulley was very worn with some damage and will need to be replaced.
SOLUTION
The following actions were performed on this Heald Red Head 407 spindle:
- Clean, inspect overall dimensions
- Kiss grind the tooling pilot face and the drive pulley taper OD
- Replace bearings, drive pulley, cover gaskets, and assembly screws
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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