According to Grant Erwin :
DoN. Nichols wrote:

[ ... ]

That said -- I use 5C collets in my 12x24" Clausing, and ER-32
(I think that's the size) in my Compact-5/CNC -- simply because each
came fitted with the proper adaptors. Oh yes -- also the Compact-5/CNC
is too small to accept 5C collets anyway. :-)

[ ... ]

The one disadvantage that I can see to the ER40 system is that
it will take up a bit more of the distance between centers than the 5C
would -- unless the 5C were mounted in a collet chuck (such as what
Bison offers), which is totally not needed in this case.

[ ... ]

Well, if he has a proper 5C setup, he can pass stock through the 5C collets,
where the ER40 collets in a 5MT holder are blind.

O.K. That is something which I overlooked. One reason is that
the holder for the ER32 collets in the Compact-5/CNC does not have that
particular problem. But with the 5MT setup, you would need a drawbar,
and I don't think that a drawbar for 5MT can be made hollow and large
enough to pass 1" stock through it -- even assuming that there is room
within the 5MT to clear stock at least part way through.

Thanks,
DoN.
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