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
Okamoto Linear 618B Spindle Repair
The Okamoto Linear 618B is a precision hand fed surface grinder. It comes equipped with a grease lubricated and belt driven spindle capable of running up to 4,250 rpm.
This Okamoto Linear 618B spindle had bearings that were noisy when rotated by hand in assembly incoming. After a full breakdown and evaluation, we noted that the grease was washed out of the front bearing pair, remaining grease in the rear pair was severely degraded. The wheel hub retention threads were extremely worn and the wheel hub OD taper was very worn with excessive runout. Lastly, the front and rear shaft centers were damaged. No other dimensional deviations were noted for the repair.
The following actions were performed on this Okamoto Linear 618B spindle:
- Clean, inspect overall dimensions
- Remove the worn hub retention threads and install a threaded stud
- Rework the rear shaft center
- Grind, chrome plate, and finish grind the wheel hub OD taper
- Replace all bearings, o-rings, and assembly screws
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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In this helpful guide to spindle bearing preload, Northland Tool & Electronics will answer all the basic questions about your spindle bearing preload calculations.Read More