On Sep 8, 1:37*pm, JR North wrote:
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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You could broach a key slot and press the key against the D with the
setscrew. Make the key a light / medium press fit in its slot and the
gear shouldn't shift. A key this small can be adjusted to fit with a
small hammer.

Jim Wilkins