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Chuck Jaws. What size

Discussion in 'Getting Started' started by William Rogers, Jun 5, 2019.

  1. William Rogers

    William Rogers

    Mar 19, 2016
    Location (City & State):
    Haubstadt, Indiana
    I haven't seen much in what size chuck jaws should be used with blank size. Is there a standard? As an example for a 20" blank what size jaws and what size chuck are required?
  2. john lucas

    john lucas AAW Forum Expert

    Apr 26, 2004
    Location (City & State):
    Cookeville TN USA
    Dont know a definitive answer. Depends a little on what your doing to the blank as well as its size. For years I only had one chuck with 2" jaws. I turned everything with it. Now I have almost all sizes of jaws Vicmarc sells and use them all. Ideally you should use larger jaws for larger pieces but in reality that means larger tenons or recesses. I have seen size recommendations in chuck owners manuals but it's been too long to remember where.
  3. Bill Boehme

    Bill Boehme Administrator Staff Member

    Jan 27, 2005
    Location (City & State):
    Dalworthington Gardens, TX
    Home Page:
    It depends somewhat on what you are making, but I don't want the chuck body nor jaws to influence the design. I also don't want it to restrict my access on the headstock side of the piece. So unless I need large jaws to hold a large piece of wood I normally use a Oneway Talon with #2 jaws or Vicmarc VM100 with standard jaws.

    A 20" blank is really large so I would consider the Oneway Stronghold with #3 or #4 jaws or the Vicmarc VM120 with 148 mm jaws.
    William Rogers and hockenbery like this.
  4. David Hill

    David Hill

    Dec 30, 2012
    Location (City & State):
    Cuero, Texas
    I use Vicmarc and PSI chucks—for me jaw size is pretty much determined by what I think the bottom will be. Choice is pretty much wide open as long as there is is good support and balance.
    Bill Boehme likes this.
  5. Gary Beasley

    Gary Beasley

    Sep 12, 2017
    Location (City & State):
    Marietta, Georgia
    I splurged on a Nova Infinity and now have a complete set of jaws from #1 to #7 so I just make the tenon whatever size looks good for the bowl and pick a set to fit. The jaws all overlap in size which fixed a glaring error in the way the old jaws were sized.
    Timothy White likes this.
  6. Hy Tran

    Hy Tran

    Dec 7, 2012
    Location (City & State):
    Albuquerque, NM
    I have a (Super)Nova with all the jaws on my larger lathe (will soon upgrade the Nova, though). My most frequently used jaws on the larger lathe are the #2. I think up to 16", I'm pretty comfortable using the #2 jaws. For something larger than 16" diameter, I'd go to the 100mm jaws.

    My second-most used jaws are the smaller jaws (pin-like jaws) for boxes.

    Not counting "reverse chucking" uses--e.g. Cole jaws or similar.

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