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
Okuma Howa 438 Spindle Repair
The Okuma Howa 438 spindle is grease lubricated, stator driven, and capable of running up to 10,000 rpm.
This Okuma Howa 438 spindle was sent in for a full breakdown and evaluation. Upon inspecting the spindle, we noted that the front bearings were severely contaminated. The bare shaft taper had 20-25 microns runout and the drawbar nuts were backed off causing low pull force. No other dimensional deviations were noted for this repair.
The following actions were performed on this Okuma Howa 438 spindle:
- Clean all parts of the spindle
- Replace bearings, o-rings, and assembly screws
- Grind, chrome plate, and finish grind the 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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Downtime is inevitable for any machine, but knowing how to reduce downtime or minimize its likelihood is critical.Read More