John Martin wrote:
You're right, Nick - it's a key slot and has nothing to do with
expansion or contraction.
It's not that I want to be right, I want to understand why it is the way
it is. For that application, the key slot is quite odd, so I think the
usage is something different.
I tried to fool you, but couldn't.
Or maybe I'm still fooling you? :-)))
You're probably also right about broaching the slot. If I had to make
them, though, I think I'd just run the slitting cutter a little deeper
to cut the through slot and the shallow slot on the far side in one
pass.
ACK, that's what I meant.
But there is undoubtedly a good reason for a separate broaching
operation.
That's what I would like to know.
Maybe they slit it before they bore it and cut to length.
Slitting before boring would not be very clever.
Enjoy,
Nick
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