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Rockwell 31-501 upper shaft jam nut

challenger

Stainless
Joined
Mar 6, 2003
Location
Hampstead, NC-S.E. Coast
I have one of these oldish 6x48 sanders. Mine is actually a combination disk/belt but my problem is with the belt sander upper drum shaft. I'm missing three of the four nuts that position the shaft in the yoke. I measured the shaft at 15mm but the thread is 24 TPI. Can anyone else confirm this odd arrangement? I'm about to make new nuts for it and people are telling me that "it has to be 1mm" pitch???
Thanks
 








 
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