Re: South Bend 3C lever collet closer on an Atlas Craftsman...
- Atlas sold a Center Ejector Bar as an accessory or attachment. Their 1945 advertising text; "Removes center from spindle without burring center or sleeve. Steel shaft has knurled ball grip -- brass head cannot damage center sleeve or spindle." No. M6-790 CENTER EJECTOR BAR. Length 10". Code word YAZWY wt. 1-1/2 lb..........
I made one and enjoy making tools from various items laying around. The ejector rod I constructed was with an antique phenolic industrial knob, the skinny half of an old pool cue and the cue's threaded brass male union portion. It works great, Mick
--- In firstname.lastname@example.org, anthrhodes@... wrote:
> Can't help with the length of the draw tube but here are the drawings for
> the 3AT and 3C collets, also the adapters for each because they give some
> info on the draw tubes which might help in determining their lengths.
> Draw tube should fit through the spindle but the length may need adjustment
> because of possible differences in the lengths of Atlas and SB spindles.
> You will also have to determine the details for seating the operating
> mechanism on the tail of the spindle and provide a link to the bed or headstock.
> The other elements are the closing adapter, the drawings for which I've
> supplied, and the nut that screws on the nose thread where chucks are mounted.
> The nut protects the thread from damage but, equally important, is used to
> lever the adapter out of the Morse taper. Without the nut you'd have to
> knock it out by rapping with a bar from the spindle tail, not good for the
> Berkeley, Calif.
> In a message dated Sun Jun 23, 2013 5:11 pm (PDT), wa5cab writes:
> I don't know. But I have an Atlas 6692 and most of an Atlas 900B (both use
> 3AT collets but somewhere around here I have the 3AT and 3C collet
> dimensions). If you can get the spindle coupling thread dimensions and the
> diameter and length we can figure out the answer.