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  • collet type

    I have a small horizontal bench mill that uses an odd collet that looks similar to a Cincinnati C2 but is smaller but larger than a C1. The spindle bore is probably .625 and uses a spindle nut to tighten. The collet tool size is 1/4 to 1/2 max. They are used on a Jefferson horizontal bench mill. Please help find the type of collet.

  • #2
    Originally posted by tew45 View Post
    I have a small horizontal bench mill that uses an odd collet that looks similar to a Cincinnati C2 but is smaller but larger than a C1. The spindle bore is probably .625 and uses a spindle nut to tighten. The collet tool size is 1/4 to 1/2 max. They are used on a Jefferson horizontal bench mill. Please help find the type of collet.
    If you could put up a photo of one of the collets with something next to it of known size to show scale, that would help a lot. I don't know of any collet with a body diameter of 0.625", but we might be talking about Jarno, Morse, or B&S taper collets rather than a steeper angle type with a straight body.
    Max
    http://joyofprecision.com/

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    • #3
      3C collets I believe have 0.650" bodies. There was also an Atlas version, the 3AT series. I have a whole bag of those in front of me which I have no use for.

      Post a pic. If you need what I have this might be your lucky day. :-)

      metalmagpie

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      • #4
        I will try to get a photo on next week if I can. The collets look exactly like a Cincinnati C2 except for the size.
        It will fit a .625 bore and tapers out to .880 and 1.822 long. I will get a comparison when I can find my wifes camera.

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        • #5
          You are most likely correct! I was looking at CH series collets where the CH2 is .910. I am having trouble finding extra collets to replace missing. I am trying to piece together a vertical setup for the Jefferson and one for my Atlas. I haven't checked the Atlas in a few years and will probably need help on that one also. I should have done this when I still had a brain that worked. I have retired for the 4th time and hope to spend more time in the shop. All of my tools are old but do a very good job when I am right. Thank you very much for your help.

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          • #6
            Originally posted by metalmagpie View Post
            3C collets I believe have 0.650" bodies. There was also an Atlas version, the 3AT series. I have a whole bag of those in front of me which I have no use for.

            Post a pic. If you need what I have this might be your lucky day. :-)

            metalmagpie
            I need to get some 3AT collets for my Atlas lathe. I have the 3AT adaptor, draw bar, and the milling attachment, but I don't have any collets. I just recently got laid off at work so I'm crazy poor right now. Any chance you'll sell one at a time...like one collet every other week? I need to get some of those at some point. If not, I totally understand...I'll get some another time.

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            • #7
              I found a camera and made a couple of photos but photobucket and I do not get along. On upload I got an unexpected error which will not go away. I have two Atlas lathes but have never thought I could use collets. If they are priced in my comfort area I would try them. I also have a nearly complete vertical attachment that uses morris taper collets but I can make them. If I ever get photobucket and me on the same page I will send photos. Also the C series collets I have seen recently are to be used with a draw bar and the ones I use are too short and do not have threads on the rear. I will keep on and on!

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              • #8
                Photobucket is still bad for me, but I think the collets are the Cincinnati A series. I think I can modify the spindle to work with the ER series collets. Still looking!

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