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
Daewoo DMV 500 Spindle Repair
The Daewoo DMV 500 is a CNC vertical machining center. It comes standard with a grease lubricated and belt driven spindle capable of running up to 10,000 rpm.
Our customer sent in this spindle letting us know that a failure of the spindle chiller unit had led to the spindle becoming noisy and rough. When the spindle arrived at Northland Tool and Electronics, it was all but seized as it could be moved only slightly with force. Upon disassembly, we noted that the front bearings contained no grease and had suffered a catastrophic failure. The tooling taper ID was worn with high runout (5µm) and poor tool contact. Lastly, the gripper fingers had significant wear on the critical tool retention surfaces. No other significant dimensional deviations were noted (bearing journals/shoulders, housing bores).
The following actions were performed on this Daewoo DMV 500 spindle:
- Clean, inspect overall dimensions
- Grind, chrome plate, and finish grind the tooling taper ID
- Replace bearings, bellevilles, grippers, o-rings, and assembly screws
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.
Daewoo DMV 500 Spindle Repair
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Downtime is inevitable for any machine, but knowing how to reduce downtime or minimize its likelihood is critical.Read More