On Nov 27, 11:28 am, "Tom Dougall" wrote:
Looks like a modification of the Robert Sorby steb centre.

Tom"mac davis" wrote in message

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On Mon, 26 Nov 2007 10:45:34 -0800 (PST), wrote:

Or, they could just buy one of these.. lol

Mac, if you know of a supplier/manufacturer who stocks/makes such
chuck accessories covering the most common headstock spindle threads
please share your source. I personally haven't seen such an accessory
on the market. Of course one can get one's local machinist to knock
the accessory up at a price. All I was offering was the idea.

Exbrat

As I understood it, you wanted something to fit in your chuck, have a
point and
tap stock to mark it, right?
I still like the link I gave you for a wall mounted one, but how about
this:
http://www.pennstateind.com/store/lcentqc1.html
I have one ordered, but just because I'm tired of taking the chuck off the
spindle just to do a few minutes of work between centers...

mac

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Hi Tom, No it's not like the Robert Sorby steb centre. That, as I see
it, is just another drive center with a parallel shaft that can be
fitted into a chuck as opposed to a morse taper shanked drive center
fitting into the headstock direct. It has its uses of course as it
obviates the need for swapping out the chuck all the time. As I
mentioned in my post to Mac, I use a countersink bit for small
workpieces and a home made (modified old Forstner bit) for larger
work. So, back to my idea. It is not another drive center! It's a way
of accurately and rapidly marking and indenting regular sectioned
workpieces ready for mounting between centers.

Hi Patrick and Gerald Ross, We must have reached a thousand words so I
think a picture(s) is right. I'll do that. Just have to buff up on
how. The pointer to ABPW has put me on the right path. Watch that
space. May take me a few hours.

Exbrat