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 438-100 Spindle Repair
In most companies there are several operators working on the same machine. In this case the third shift operator took the spindle apart trying to figure out what was happening with the air purge. He then put the spindle back together. The spindle was making noise and was tight. Our technician spoke with him but was unable to troubleshoot the problem over the phone. The spindle still was not working properly so they sent it to Northland Tool and Electronics for a thorough evaluation.
CHALLENGE
We determined that this Heald 438-100 spindle had contaminated bearings, and most of the grease was washed out. The shaft face had 10 microns of runout, and needed a kiss grind. No other dimensional deviations were noted for this spindle.
SOLUTION
The following actions were performed on this Heald 438-100 spindle:
- Clean all parts of the spindle
- Replace bearings, o-rings, and assembly screws
- Kiss grind the shaft face
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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