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  • High End Chuck

    If you were looking to buy a 3 jaw chuck, say, a four inch or a five inch, what brand names would you look at, if you wanted an accurate chuck that would always be worth repairing?

  • #2
    you're going to need to qualify "accurate". But generally speaking, I'd be looking for something with a "run- tru" system. Its basically 4 positioning screws that allow you to center your 3 jaw on the spindle (like a 4 jaw chuck, but building into the chuck housing).

    and whatcha planning on doing to it that your already anticipating repairs? 🤔

    keep crap outta the scroll & pinions and a good chuck should outlast either of us.

    edit: not sure what kind of work you do, but if its 1st op bar work, you might consider a collet chuck.
    Last edited by mtraven; 04-15-2022, 05:54 AM.
    "it is no measure of mental health to be well adjusted to a profoundly sick society." -- krishnamurti
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    "any intelligent fool can make things bigger and more complex...It takes a touch of genius - and a lot of courage to move in the opposite direction."

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    • #3
      New? I'd say Rolm would be the best, then Yuasa. Bison seems like its getting up there...once mid level, they seem to be highly regarded now. Once upon a time, Pratt Burnerd would have been my number 1; its the chuck Schaublin chose to ship with their lathes for example. But they've made a concerted effort to confuse and mess up a brand I'm not sure what you get anymore (PB was British, now there is PBA, PBA Atlas etc). Marketing idiocy.

      Of all the workhold devices, accuracy of the 3 jaw matters the least so I don't know that if I was shopping for new I'd spend the big bucks.
      Last edited by Mcgyver; 04-15-2022, 07:07 AM.
      in Toronto Ontario - where are you?

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      • #4
        Originally posted by Mcgyver View Post
        ............................................

        Of all the workhold devices, accuracy of the 3 jaw matters the least so I don't know that if I was shopping for new I'd spend the big bucks.
        True enough, although centering is only one of a number of factors involved in a top quality chuck, and not the most important one. Jaws that grip accurately parallel to the centerline, consistency/repeatability, etc seem to be pretty important as well.

        The adjust-tru feature is quite handy, and makes the repeatability more important for doing a run of parts. It's a step between a 4 jaw and a high quality collet, in the balance of convenience and accurate centering on successive "identical" parts.
        4357 2773 5150 9120 9135 8645 1007 1190 2133 9120 5942

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        Hashim Khan

        Everything not impossible is compulsory

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        • #5
          Agree with the comments on the PB and Bison.

          TOS and Vertex are also worth considering but difficult to find in NA. I have 3 from TOS but none from Vertex - but figure that the quality of their lathe chucks will be the same as their keyless drill chucks. I have a 1/2” sized one of the latter and it is really smooth and very accurate.




          Geoff

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          • #6
            What ever the CNC lathes use on industrial machines

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            • #7
              The best would be a Schunk. Get the song in your head, "nothing compares to you". That is a Schunk.
              https://schunk.com/shop/de/de/Spannt...ine/c/PUB_2632
              Last edited by Black Forest; 04-15-2022, 11:43 AM.
              Location: The Black Forest in Germany

              How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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              • #8
                Rohm or Bison if I could afford them. One of my top finds last year was a 4" Pratt Burnerd NOS British made with both sets of jaws for about £25. It is a little gem now modified for 6 mounting screws to hold it on a loose register to the backplate for a poor mans "set tru" adjustability if needed. It complements the 125mm, 5" and 160mm chucks already used on the lathe, being better for small jobs.
                Properly looked after and used, cleaned regularly, a chuck should last indefinitely.
                Last edited by old mart; 04-15-2022, 10:39 AM.

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                • #9
                  Originally posted by Jammer Six View Post
                  If you were looking to buy a 3 jaw chuck, say, a four inch or a five inch, what brand names would you look at, if you wanted an accurate chuck that would always be worth repairing?
                  Buck Chuck or Pratt Bernard

                  Rich

                  BF your link does not work
                  Green Bay, WI

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                  • #10
                    Schunk. No point in staying with the past

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                    • #11
                      Originally posted by RB211 View Post
                      Schunk. No point in staying with the past
                      What are you talking about?
                      Location: The Black Forest in Germany

                      How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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                      • #12
                        Try it now.
                        Location: The Black Forest in Germany

                        How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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                        • #13
                          Originally posted by Rich Carlstedt View Post

                          Buck Chuck or Pratt Bernard

                          Rich

                          BF your link does not work
                          fixed it. Danke
                          Location: The Black Forest in Germany

                          How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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                          • #14
                            Originally posted by Black Forest View Post

                            What are you talking about?
                            Agreeing with you!
                             

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                            • #15
                              Buck; Bison.
                              21" Royersford Excelsior CamelBack Drillpress Restoration
                              1943 Sidney 16x54 Lathe Restoration

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