Niigata SPN 40 Spindle Rebuild
Possible cause of failure:
Catastrophic failure of #1 and #2 front bearings.
Shaft 40 taper is below gauge line.
OD of shaft nose has a large dent, drive dogs have light cosmetic wear.
Clean, inspect overall dimensions.
Grind, plate & regrind shaft 40 taper.
True bearing spacer shoulders.
Replace bearings & o-rings.
Adjust preload, balance, assemble and break in. Final quality control inspection.
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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…