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
Boneham GS7433 Spindle Repair
This Boneham GS7433 spindle is grease lubricated and pulley driven making it capable of speeds up to 10,000 rpm.
Upon inspection of this Boneham GS7433 spindle it was found that the grease in the rear bearings was discolored, indicating severe contamination. The customer requested the installation of a front air purge & kiss grind of the hub taper. We found that the hub taper had rubout damage from a spinning hub, therefore the gap was too low to kiss grind and will need GPG. We also noted that the front housing ID was egged & tapered +5/-10µ (ISO is ±6.5µ).
The following actions were performed on this Boneham GS7433 spindle:
- Clean, inspect overall dimensions.
- Machine 10/32” threaded air purge inlet hole in nose of spindle housing, install 1/8” x 10/32” push connect fitting.
- Create air purge path in front housing nut & cover.
- Grind, chrome plate & finish grind hub taper & front housing ID.
- Replace bearings & Listo seal.
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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