I got a tool & cutter grinder head from a junk shop (for free) that is
missing the arbor nuts and outer collars.The bearings are in good shape
as well as the motor itself.

But I can't find the arbor nuts.

I've measured the shaft and threads but I can't decide if they measu
16 mm x 1.25 mm
or
5/8" by 20

I suspect that either one wouold work after a fashion since neither
seems to be an exact match for the thread pitch.

However, my regular sources for odd size stuff (www.boltdepot.com and
www.fastenal.com) don't list either one of these sizes.

It seems a shame to toss the work head just because I can't locate a
couple of arbor nuts.

Any ideas?


Gary

PS The work head is completely unmarked - other than a switch saying it
is rated 15 A at 125 VAC.