Re: 3C vs 6K
Jim B. <btdtrf@...>
I have a 10K spindle in my 9” Workshop headstock.
I do use 6K/3C/3AT collets.
I do not have a speed closer. I do have 3 handwheel closers.
The 3C and the 3AT have essentially the same threads but the 3AT is shorter, a bit larger in diameter and has a different taper than the 3C.
I have two POT collets for 3C.
I see no reason you could not make a tube for the 3C to fit your speed closer.
You would need a taper adapter sleeve for your lathe, to take 3C if you do not have one and a Nose piece if you do not have one
Now a once in a lifetime offer.
I have a brand new 6K pot collet. Never used. It’s a big one, 4-1/2 OD.
I will probably never use it. I have had it since about the time SB had their going out of business sale.
I would be willing to part with it. I am getting old and need to start clearing stuff out.
Not inexpensive but if you are interested contact me off line.
I also have 3 6K SOFT steel collets; a 1/8 a ½, and a 9/16” (9/16 could be 35/64. All are unmarked.
They say Modern, 6K, soft.
I think you could just turn a shallow 1” ring in them. The OD seems to be 1-3/16 (1.178), the key is 0.080 deep.
The ring might break through the key.
Perhaps one of these would do better; I would guess the 9/16 one could work.
These would be cheaper.
From: SOUTHBENDLATHE@... [mailto:SOUTHBENDLATHE@...] On Behalf Of David Rysdam
Sent: Tuesday, April 01, 2014 1:52 PM
Subject: [SOUTHBENDLATHE] 3C vs 6K
decoder ring project, I think I want to use a pot collet (why are