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  • Newbie needs chuck selection help

    Hi all

    I need a 4 jaw independent chuck for a steam engine project I am making.

    I have a 7x10 mini lathe and according to the info in the “little Machine Shop” it seems that a 5” diameter chuck should fit on the lathe. The cost is about the same as a 4" diam. Is there a down side to buying the 5” jaw chuck for this lathe over the 4”?? What am I missing??

    Many thanks

    Ken K1UM

  • #2
    It seems to me as though you should be okay with a 5" chuck, but I think it's difficult to make a definitive statement about it. "Fit" and "be in proportion to the rest of the lathe" are two different things, and the latter is hard to quantify.

    For example, I could probably fit an 8" chuck on my 10K, but I think a 6" chuck is actually a more appropriate size. Others might disagree.

    One thing that might come into play is clearance for the cross slide; will the cross slide go under a 4" chuck, but not a 5" chuck? The cross slide doesn't necessarily HAVE to fit under the chuck, but it might be worth thinking about.
    ----------
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    • #3
      another thought

      Looking at the same question myself. Thinking that 11 lbs for the 5 in diameter chuck is adding quite a bit of metal vs a more reasonable - imo - 7 lbs for the smaller one. But, there is that extra inch of capacity...

      Aside: pls post back with your choice & how it works out.

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      • #4
        A 4 inch chuck on a 7 x 10 lathe is a nice compromise. Yes, it's heavier, but mine's had no problems spinning it. The controller uses a soft start, so it spins up slowly anyway.

        A larger chuck usually has a larger bore, which may be nice.

        With a 5 inch chuck your jaws will protrude an inch when holding a piece that is about 2 or 3 inches diameter. They will hit the ways much sooner than you think that they will.

        The end result is that a larger chuck will not always let you work on larger pieces. It will do a better job when holding a large piece from the inside.

        I leave my 4 inch, 4 jaw independent on my 7x12 lathe most of the time.

        Dan
        At the end of the project, there is a profound difference between spare parts and extra parts.

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        • #5
          thanks

          Thanks for the guidence.... I have decided to go with the 4 jaw chuck from the Little Machine Shop...

          Ken

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          • #6
            Going With 4" Chuck!!!

            Chris at Little Machine Shop told me that 5" chuck is simply too big for 7x10 HF lathe!!

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            • #7
              Good to know, I am pondering a 4-jaw too.
              This product has been determined by the state of California to cause permanent irreversible death. This statement may or may not be recognized as valid by all states.
              Heirs of an old war/that's what we've become Inheriting troubles I'm mentally numb
              Plastic Operators Dot Com

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              • #8
                4 Jaw Chucks

                Hi Ken
                I suggest that you take a look at Varmint Al's web-site.
                http://www.varmintal.com/alath.htm
                When you get there click on 4 Jaw Chucks at the top of the page.
                You will find useful information there.
                Chuck

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                • #9
                  More on chucks

                  Hi Again
                  http://www.mini-lathe.com/Mini_lathe...03-Jaw%20Chuck

                  I believe you will find just about all you want to know about chucks and backing plates for your 7 series lathes here.
                  Chuck
                  Last edited by Yankee1; 02-10-2009, 12:19 AM. Reason: misspelled a word

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                  • #10
                    Great, Thanks

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