Catastrophic bearing failure was the main cause of this spindle malfunction Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication……Read More
Hardinge Spindle Repair
A returning customer called us about this Hardinge 10,000 rpm spindle. After two years of running the spindle, it started to make a high pitched noise. The customer’s machine tool repairman went in and told them it was belt noise. The customer adjusted belts and the spindle was quiet again. A month later, they called in and the spindle was no longer running and the spindle was coming in for evaluation.
We received the spindle and found that the spindle was seized. (When we receive spindles in that do spin we will test run it for an extensive evaluation.) The customer was made aware that the spindle was seized and that we needed to break it down. The breakdown evaluation showed that the spindle had catastrophic rear roller failure. The rear of the spindle was coated with a sticky coolant residue and the rear bearing had failed from the contamination. A detailed report was sent to the customer and it indicated that the customer should check their rotary union.
The following actions were performed on this Hardinge spindle:
- Clean all parts of the spindle
- Replace all bolts, o-rings, and bellevilles
- Replace bearings
- Kiss grind the tooling taper
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.
Hardinge Conquest 42 Spindle Repair
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Upon inspection of this Bridgeport VMC 760/16 spindle, we found that the front bearings were installed wrong (backwards). The rear roller was found to be… [...]
Downtime is inevitable for any machine, but knowing how to reduce downtime or minimize its likelihood is critical.Read More