Hi all,
 Actually....irrespective of this fine reference below....there is a
question, at least
in my mind that is wondering what would happen, if, say, the two outside
rods
are smaller in diameter than the center rod? Would the friction be reduced
or
increased? What if the center rod is smaller than the outside rods? I'd
think
it might not make much friction difference....but one can be surprised.
Anyway,
sooner or later someone will try such.....
 Take care, Meredith Lamb

 On 10/24/05, Charles R. Patton  wrote:
>
> Some suggestions for sources:
>
> The Electronic Goldmine
> http://www.goldmine-elec-products.com/searchprods.asp
> part no. G961
> is three carbide router bits with 1/8 " shanks for $2. I've bought
> these in the past and they have very good finishes and the shanks are
> about 1/2 inch long.
>
> If you're in good graces with your dentist, ask him for used dental
> drills (actually minature router bits.) However be aware that these may
> only be carbide brazed to HS steel shanks (like the ones I got.) But I
> guess that some may be carbide all the way. I'd be interested if your
> results vary!
>
> Look at part no. 8788A124
> from McMaster Carr 1 1/2 in. long by 1/8 in dia. carbide drill blanks.
> $1.95 ea. Many other lengths and dia. available.
> http://www.mcmaster.com/
>
> Regards,
> Charles Patton
>
>
>
>
Hi all,
 
Actually....irrespective of this fine reference below....there is a qu=
estion, at least
in my mind that is wondering what would happen, if, say, the two outsi=
de rods
are smaller in diameter than the center rod?  Would the friction =
be reduced or
increased?  What if the center rod is smaller than the outside ro=
ds?  I'd think
it might not make much friction difference....but one can be surprised=
..  Anyway,
sooner or later someone will try such.....
 
Take care, Meredith Lamb 

 
On 10/24/05, Charles R. Patton <cha=
rles.r.patton@........> wrote:
Some suggestions for sources:
The Electronic Goldmine

http://www.goldmine-elec-products.com/searchprods.asp
part no. G961<=
br>is three carbide router bits with 1/8 " shanks for $2.  I=
've bought
these in the past and they have very good finishes and the sh=
anks are

about 1/2 inch long.

If you're in good graces with your dentist,=
 ask him for used dental
drills (actually minature router bits.) &n=
bsp;However be aware that these may
only be carbide brazed to HS steel s=
hanks (like the ones I got.)  But I

guess that some may be carbide all the way.  I'd be intereste=
d if your
results vary!

Look at part no. 8788A124
from McMaste=
r Carr  1 1/2 in. long by 1/8 in dia. carbide drill blanks.
$1=
..95 ea.  Many other lengths and dia. available.

http://www.mcmaster.com/
Regards,
Charles Patton