Looking for Miniature Boring Mill / Face Plate Jaws - Page 2
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  1. #21
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    Quote Originally Posted by Zahnrad Kopf View Post
    A face plate can EASILY be 0.750" and clamps 2.5" would mean I save/regain/avoid consuming 2.50". That's a 43% savings. And a big deal.

    It is entirely possible that we could even get away with a 0.50" thick face plate. And, if we consider the "jaws" that I modeled being 2.0" tall, we save SIGNIFICANT amount of work envelope.
    You are only looking at the "numbers" for space.

    You need to ALSO look at the "numbers" for stress distribution.

    Half-inch - or even 3/4" un-ribbed plate is going to flex when your work applies the advantage of leverage from points a coupla inches out.

    Try that, "static" on plate stock with some scrap and a DI before you waste time building it.

    A mere fractional thou of movement, worse "bellmouthing" at that, and... your work is no longer properly gripped, can wobble - then crash.

    Might still work for grinding, but not so much for milling or turning.

    How to counter that flex?

    Can you add a skirt and/or a hollow ring ABOVE the plate to apply jacking force to the back of the jaws directly, further up off the plate?

    The jaws and work then being gripped down inside a well or sort of "cup" to save space. A conventional chuck conceptually turned "inside-out", so to speak.

    RBK to swap workpieces, even so....

    Guessing that's why more than one size of machine tool exist?


  2. #22
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    Quote Originally Posted by thermite View Post
    You are only looking at the "numbers" for space.
    No. No, I am not.

    Quote Originally Posted by thermite View Post
    You need to ALSO look at the "numbers" for stress distribution.
    No. No, I do not.

    Quote Originally Posted by thermite View Post
    Might still work for grinding, but not so much for milling or turning.
    I already have already evaluated these things, fairly thoroughly. You appear to be making some assumptions about the specific application, and they are not correct.


    Quote Originally Posted by Zahnrad Kopf View Post
    ... it's always a toss up or gamble as to how much detail to offer when starting out, here. Not enough information or background, and it is unhelpful in soliciting input. Too much information and people start veering off offering anecdotal comment relating to that one time in band camp...
    From my original post -

    Quote Originally Posted by Zahnrad Kopf View Post
    Looking for a miniature/smaller version of Boring Mill or Face Plate jaws.
    Unless I say otherwise, trust me to know what I want when I ask for it.

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  4. #23
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    Quote Originally Posted by Zahnrad Kopf View Post
    Unless I say otherwise, trust me to know what I want when I ask for it.
    LOL! We trust you to know what you WANT, well enough.

    You're just kinda hard-headed about the road to GETTING it!

    OTOH.. that's part of what separates those who find a way to eat reg'lar like...
    ...and those others who have to rely on voting theyselves gummint handouts..

    So "press on" ....and do let us know what you finally work-up and how it works.

  5. #24
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    Here's a tiny version of what Chuck posted.
    I think this, scaled up, made much taller, the angle greatly increased, fastener sizes increased, the moveable jaw registered to the fixed body side to side(make it wider and tight fit to the body) maybe a shallow Vee on the face, would work for shaft work. I think there are bolt holes in the machine to fasten them to w/o a face plate?

    111.jpg

  6. #25
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    Could any of AMF's products be used?

    Page 102 and onwards?


    https://www.amf.de/files/amf-assets/...nnelemente.pdf


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