I didn't even think to look at the holes for taper. Normally I'd have
thrown this thing in my bag for regular perusal of a new whatsit, but I'm
trying to limit the bits of metal I carry on a daily basis,

I'll check it out when I get home and see if there's any taper that
conforms with Machinery standards.



On Wed, Feb 13, 2019 at 6:39 AM John Ruth  wrote:

> Michael,
>
> In light of your answer to Ed’s question, my perception of this item is
> shifting from “Rivet Set” toward “Machinery Part,” even though I did see a
> response from another Porch dweller that indicated he also thought it was a
> Rivet Set. If that member is positive, then what follows is probably just
> wrong.
>
> The technique of locking a machine part onto a shaft with an off-center
> cross-drilled pin is well known.  A taper reamer is often used to taper the
> cross-hole such that a tapered pin can be backed out to release the parts.
> (There are standards for tapered pins in Machinery’s Handbook.)
>
> If the small hole is slightly tapered and the large hole isn’t, then it’s
> not a Rivet Set, but rather a machinery part.
>
> The holes are rather large for a Rivet Set, to begin with.
>
> John Ruth
>
>
>

-- 
Michael