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 Elite 6/42 Spindle Repair
The Hardinge Elite 6/42 is a high production CNC turning center. It comes equipped with a grease lubricated and stator driven spindle capable of running up to 5,000 rpm.
CHALLENGE
When this Hardinge Elite 6/42 spindle arrived at Northland Tool and Electronics we performed a complete breakdown and evaluation. We found quite a few issues that will need to be addressed. First, the #1 and#2 front bearings failed due to coolant washing out the lubricating grease. Second, the #3 and # 4 bearings are failing and the od races are very fretted(most likely caused when the fronts failed). Third, the #’s 5,6, and 7 bearings are slightly contaminated. Fourth, the guide bushing adapter had a large chip broken out of it at some existing balance holes. Fifth, the rear wiper seal for the draw tube support shaft was broken into several pieces. Lastly, the secondary collet 3/16″ hole is out of round, the guide bushing collet face and ID were worn. The spindle was sent in missing the rear actuator assembly.
SOLUTION
The following actions were performed on this Hardinge Elite 6/42 spindle:
- Clean, inspect overall dimensions
- Replace bearings, o-rings
- Replace fittings, oil lines, guide bushing adapter, and the collets
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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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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