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Vertical 5C collet vise - anybody have one?

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  • Toolguy
    replied
    Collet

    There are collet holders where the collet is stationary and a sleeve around it moves up and down parallel to the length of the collet. The manual lever closer pictured above and the air powered one mentioned earlier are 2 examples.

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  • whitis
    replied
    Originally posted by Doozer
    Not moving the collet is best. That makes it dead length. --Doozer
    Whether you press on the front, like an ER style, or pull with a draw bar, the collet moves longitudinally. It is pretty much the nature of the beast and attempts to design a collet that doesn't move are likely to create more problems (like runout) than they solve.

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  • Doozer
    replied
    Not moving the collet is best. That makes it dead length. --Doozer
    Last edited by Doozer; 12-01-2010, 08:59 PM.

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  • KEJR
    replied
    The idea of using a front nut to close the 5C collet was done before by someone in this forum I believe.

    I can't help but think there is a flaw in this approach or I think you would see more people doing it. I would think it would be tough to bear down on the three sections of the collet with equal force since the front of the 5C collets are mostly just clearance and not necessarily precision ground like on a ER collet. It would be good to know how well it works though.

    KEJR

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  • KEJR
    replied
    I have one of these. Its not the best tool in the world but its probably a bit better than the one in the original post. Just a consideration...



    KEJR

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  • J. R. Williams
    replied
    Vertical Collet

    I have a small horizontal/vertical unit mounted on one side of my mill's table. It is a manual operated unit. I also have a, surplus to me, an air operated unit that is only a vertical unit. It is great for production work. It is very handy tool for a mill.

    JRW

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  • dave5605
    replied
    I have one of the Shars horiz/vertical ones. The handle on the clamp ring hit the side casting before the collet was tight. Just milled the casting down.
    The inside surface of the clamp ring wasn't 100% on the money so it tends to make the collet not reseat the same each time.

    The other thing I noticed with my cheap ENCO collets is that they don't spring open enough to let go of the material so just a 3/4 turn on the lock doesn't do the job. Hence I have to spin the handle more than a full turn.

    For $35 and my loose tolerance work its ok though.

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  • Toolguy
    replied
    Collet Chuck

    That would work if you make the nut part with holes or slots for a pin spanner or a hook spanner and leave the handle off. Super simple.

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  • WaveDude
    replied
    Anyone tried converting one of those into a poor man's lathe collet chuck?

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  • dave5605
    replied
    On that one the OP shows there is a spring in the bottom that the collet sits on. The top part is simply a screw on collar with a handle to help spin it.

    5c simply gets clamped (in to its taper) by its outside face by the collar. On mine the inside of the collar wasn't machined correctly so it tended to make the collet face 'wander' as you clamped it down.

    Just about every online place that sells off shore stuff has them.
    http://www.shars.com/products/view/1...C_Collet_Chuck

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  • Toolguy
    replied
    If you build one, you may want to make it long enough to clear a collet stop at the bottom.

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  • hornluv
    replied
    Thanks guys. I figured it was some kind of cam thing, but threads make sense. I like the thrust bearing idea. Otherwise, I could see this really messing up the face of the collet. I don't need this to index anything. I just need to use it as a fixture for milling flats on opposite sides of a piece of round stock without having to locate the stock each and every time.

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  • murph64
    replied
    Something on my to do list is to make a vertical "stand" for a DA180 collet holder. I have a couple of old Cummins wrist pins that are > < close to fitting. Ballpark is a .04 or .05 or so cut at 16*.



    Andy

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  • Mcgyver
    replied
    there's a hole variety of 5C collet indexers that operate in the vertical and horizontal positions. i've got one these, a Yuasa...they can be found for reasonable dollars used or i'm sure they are chinese knock offs

    http://www.google.ca/imgres?imgurl=h...w=1603&bih=789

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  • Toolguy
    replied
    I haven't used one of those, but I suspect the lever part is just threaded onto the body part. You can either push or pull a collet into the taper to make it grip.
    It might be a good idea to have a roller thrust bearing and washer to fit the face of a 5C collet in the top of the lever part. I have other ways of holding a 5C vertical and it comes in very handy at times.

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