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 MoreHardinge VMC 1000 Spindle Repair
This was our customers spare Hardinge spindle. They removed it from service because it had bearing noise. The drawbar was removed and put into the spindle that was installed in the machine. We like to get all the rotating parts for every repair to guarantee adequate balance but we also realize in some cases it is not possible.
CHALLENGE
When this Hardinge VMC 1000 spindle arrived at our facility we completed a full breakdown and evaluation of the spindle. The first thing we noticed was that the spindle sounded rough when spun by hand incoming. It also came in with a loose pulley nut that cause the rear roller to lose preload. After disassembly, we found that the rear roller cage was broken. The front quad set had the first two bearings slightly contaminated and the second two were relatively clean. Lastly, the shaft taper had some wear that would need to be addressed. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Hardinge VMC 1000 spindle:
- Clean, inspect overall dimensions
- Replace bearings, orings, and assembly screws
- Kiss grind the 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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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.
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