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wrote:
Don Foreman wrote:

On Fri, 25 Mar 2005 14:14:06 -0600, Rex B wrote:

Ive never seen one, and it would be pretty limited in usage if

anyone

did. It should be simple enough to make a replacement spindle for

one

though.

Why would an R8 Collet be any more limited than a 5C?

R8 is closed on the inside end to accomodate the drawbar. 5C's are
threaded on the outside, so they can accomodate long stock.

R8s were intended to hold cutting tools in a quill or spindle, 5Cs were
for holding stock to be worked on in a lathe. I doubt if the O.P. will
find any tooling designed for R8s and stock-holding. How would you
draw down an R8 collet without a drawbar? The 5C indexers and blocks
use nuts or retaining rings on the outside threads to do that job. And
5C collets and tooling are so cheap it's hardly worth trying to figure
out how to use R8s for something that they weren't designed to do.

Stan

OK, guys, I'm sold!

Thanks much for the detailed responses.
I'll plan on another set of collets.

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Rex Burkheimer
WM Automotive
Fort Worth TX