Possible cause of failure:
Bearings are noisy. Taper is bell mouthed with one chip. Big-Plus test bar runout = 24-30µ.
Drive dogs have been modified.
Customer supplied a standard CT tool and knob.
Clean, inspect overall dimensions.
Replace bearings, Bellevilles, plastic oil lines, ferrules, o-rings, 10mm front cover balls and springs.
Grind, chrome plate and finish grind the taper to Big Plus 40 taper specifications.
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…