Re: @$#%&* Installation!!!!

Hmmmmmm.

3 1/2 inches per foot = 0.2916666666 inches per foot which is different
from the 0.300 for 16 degrees 41 minutes inches per foot. It makes me
wonder if the spindle taper is slightly different than the collet
taper. In some ways it makes sense to have the collet squeezed closer
to the end than on the inside. Maybe there are two different angles
involved here, one for the collet and another for the spindle.... just
so we are all on the same page here what is meant by "included" Drew
mentioned 0.147 " xmove to 1.000 " z move. Drew may just have something
there. Lets see, the shank end of the cone would be about 0.950 " the
nose of the collet would be about 1.250 " that leaves about 0.300 " 2
times 0.147 " equals close enough to 0.300 " that it makes sense to me.
Thanks for pointing that out Drew! 2 times 0.147 " = 0.294 ". That is
pretty close to an agreement on the taper. I'm glad to catch that
error!!!

Thanks,

Clint Bach

Paul Corner wrote:

>
> From: Paul Corner <Paul.Corner@...>
>
> > I'm working on getting my spinldle made into R-8
> > collets. That part is going well. I determined the taper of the cone
> > part is 16 degrees 51 minutes. 3 inches in 10 inches equalls 16 degrees
> > 41 minutes so I will just use that ratio to cut the taper.
>
> Hi Clint.
>
> I've got two drawings for R8 tapers. One from Tubal Cain's Model Engineers
> Hanbook. The taper is quoted as 16 deg 51 min included. The second drawing is
> in an old Bridgeport manual, here the taper is given as 3 1/2 inches per foot
> included.
> Hope this helps.
>
> Regards, Paul.
>
>