There should be some equation that can give the width of a flat on a shaft if
you know the diameter of the shaft and the distance from the flat to the round
side opposite.
*lightbulb* The flat is the shame as a chord. So what you want is to calculate
the length of a chord. https://byjus.com/maths/chord-of-circle/
On Saturday, March 20, 2021, 7:24:16 PM MDT, andy pugh <bodge...@gmail.com>
wrote:
On Sun, 21 Mar 2021 at 01:12, Gene Heskett <ghesk...@shentel.net> wrote:
> It seems to me there ought to be a std math rule for that, but I've not
> found a reliable reference.
Why do you think that? Surely the manufacturer can make any flat that they want?
I would measure the actual shaft (flat to rounded opposite curve) then
dimension my sketch to that actual number (my printer shrinks holes,
so I wouldn't make it any tighter deliberately)
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