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
Whitnon 442-1880-350 Spindle Repair
This spindle came equipped with contact seals to prevent coolant from getting into the bearings. Over time contact seals wear down and eventually become less effective. This allows coolant and grinding swarf to get between the shaft surface and seal which accelerates the deterioration of the seal. It can also cause wear to the shaft where the seal contacts it. Eventually the coolant gets to the bearing lubrication and causes it to break down. This eventually leads to the failure of the spindle.
This Whitnon 442-1880-350 spindle arrived at Northland Tool and Electronics for a full breakdown and evaluation. Upon disassembly, we noted that the front bearings failed from contamination. The seals wore out allowing contaminants into the bearing grease. Lastly, the shaft taper was out of ISO and will need to be ground.
The following actions were performed on this Whitnon 442-1880-350 spindle:
- Clean, inspect overall dimensions
- Replace bearings and seals
- Kiss grind shaft taper
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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