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 MoreYama Seiki AV-610 Spindle Repair
The Yama Seiki AV-610 is a CNC vertical machining center. It can come fitted with a grease lubricated and belt driven spindle that is capable of running up to 10,000 rpm.
CHALLENGE
Our customer called in and stated that they had a Yama Seiki AV-610 spindle for rebuild. The spindle was running hot and making noise. We received the spindle in and found that the front bearing had a broken cage and the grease was washed out from coolant. The gripper fingers showed signs of wear and the drawbar force was low. Lastly, the taper had 10-20 microns of run out with the test bar.(10 microns are rock)
SOLUTION
The following actions were performed on this Yama Seiki AV-610 spindle:
- Clean all parts of the spindle
- Replace bearings, o-rings, and assembly screws
- Replace bellevilles and gripper fingers
- Kiss grind CAT40 ID 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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