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
Niigata SPN40 Spindle Repair
The Niigata SPN40 is a CNC horizontal machining center. It comes equipped with an oil mist lubricated and coupling driven spindle capable of running up to 12,000 rpm.
This Niigata SPN40 spindle suffered a catastrophic failure of the #1 and #2 front bearings. After inspection, we noted that the shaft 40 taper was below gauge line. Lastly, the OD of the shaft nose had a large dent and the drive dogs had light cosmetic wear.
The following actions were performed on this Niigata SPN40 spindle:
- Clean, inspect overall dimensions
- Grind, plate, and finish grind the shaft 40 taper
- True bearing spacer shoulders
- Replace bearings and o-rings
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