Gunner Asch wrote:
On Wed, 14 Jul 2010 18:40:40 -0700, Gunner Asch
wrote:

On Wed, 14 Jul 2010 10:51:20 -0500, RBnDFW wrote:

axolotl wrote:
On 7/13/2010 2:19 PM, RBnDFW wrote:
axolotl wrote:
On 7/9/2010 12:19 PM, RBnDFW wrote:
I have a nice set of small collets that I cannot match up on any of the
collet charts. Looks like a miniature R8.

Here's the specs

3.00" OA Length
.500"bearing/shaft diameter
.675 max diameter at face.
5/16-16 internal thread.
sizes 1/6 - 3/8

B3. Used on the Bridgeport "C" head, and some of the "M" heads.
The chart I have shows the back bearing to be .650" on the B3.
Mine are .500". Thread size is also different.


Another example of my typing after looking but before reading. They are
a mystery to me. Any clues from where you got them?
Not really. They came from an estate sale, which had

Victor 16x40 lathe w/5C collets
Emco CNC 5 lathe with it's own collets
Small CNC mill that used QC tooling

So they did not fit anything there.
4C and 3C all resemble smaller and smaller versions of 5C collets


I forgot to mention WW collets, and a ****load of others...

This may be of some help...

http://www.shophardinge.com/Categories.aspx?catID=1262

Gunner, I Dl'd Hardinge's 4-page collet chart, most complete I've seen,
and nothing matches. Just scanning for ~3" OAL and ~1/2 bearing
diameter eliminates everything on the chart.