Ok JR,

Now that we have a bit more info...

Round hole, then silver brase in the "flat"... make flat from round stock
the proper diamter flattened with method of choice, mill,file,grind...

--.- Dave


"JR North" wrote in message
.. .
Have a project, need a gear for a stepper with .187" Dia D shaft. I can
make the gear; are there broaches for forming the pilot bore? Seems there
would be a bazillion different ones, depending on the width of the flat.
Else, how to?
JR
Dweller in the cellar
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