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 MoreDaewoo Mynx 500 Spindle Repair
The Daewoo Mynx 500 is a large CNC vertical machining center. It is fitted with a grease lubricated and pulley driven spindle capable of running up to 8,000 rpm.
CHALLENGE
When this Daewoo Mynx 500 arrive at Northland Tool and Electronics, the first thing we noted was that the spindle was covered in coolant residue. Upon inspection, the front bearing pair was heavily contaminated with coolant and swarf. The air purge holes in front cover were also plugged with it. Grease in rear bearing pair was lightly discolored and the drawbar was covered with coolant. The tooling taper was damaged and bell-mouthed with poor tool contact and excessive runout >15µ. Lastly, the gripper fingers (collet) were heavily worn. No other dimensional deviations were noted for this repair.
SOLUTION
The following actions were performed on this Daewoo Mynx 500 spindle:
- Clean, inspect overall dimensions
- Grind, chrome plate, and finish grind the tooling taper
- Replace bearings, bellevilles, grippers, quad seal, o-rings, and assembly screws
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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