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Chuck with backing plate mount?

Discussion in 'Getting Started' started by Justin Pierce, Apr 3, 2020.

  1. Justin Pierce

    Justin Pierce

    Joined:
    Feb 26, 2020
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    Location (City & State):
    Butternut, WI
    I think I know the answer to my question, because I've already spent an embarrassingly large amount of time searching and have not found what I want, but.............. here it goes anyway...........

    Does anybody know of a four jaw wood lathe chuck that has a backing plate mount instead of mounting on a threaded spindle?
    Backing plate mount is common on metal lathes, instead of a threaded spindle nose, there is a flange on the spindle that a metal lathe chuck mounts on.

    I want to build a lathe, but I'd prefer to mount my chuck via the backing plate method, just so you know what I'm up to.

    Let me know if you've seen anybody else in the woodworking world do this, or am I the only goofball who insists on bucking conventional wisdom?

    Thanks!
     
  2. hockenbery

    hockenbery AAW Advisor Staff Member

    Joined:
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    Location (City & State):
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    Here is the solution used on the vb36. It has a bayonet mount for faceplates.
    they made a threaded spindle adapter with a Morse taper.

    DEF28D56-A639-4D77-8484-7DEC51F28317.jpeg
     
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  3. Justin Pierce

    Justin Pierce

    Joined:
    Feb 26, 2020
    Messages:
    10
    Location (City & State):
    Butternut, WI
    Thanks!

    I've never seen the Steinert offerings before, at first glance it looks like they make about a damn fine lathe!
    Having one of those in the shop would make me grin like a mad man.

    That's an interesting design.
    I'm not sure I see the advantage of the keyhole concept though, I guess it prevents losing the mounting cap screws.
    You wouldn't have to fully remove them when removing the chuck.
    But then it looks like they have a cross bolt set screw affair so you can reverse it without concerns of dislodging the cap screws.
     
  4. Doug Freeman

    Doug Freeman

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    Feb 26, 2019
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    Location (City & State):
    Lebanon, Missouri
    Since you are making your own lathe, put a backing plate on the spindle, put 2 alignment dowel holes in the plate, make a matching dowelled plate with 1-1/4x8 threaded nose or whatever, make different thread sizes if you want. I suppose a tenon/mortise arrangement for cl alignment like above would also work. 3-4 bolts to hold it together. Best to have enough depth for an MT in the center. You need a through hole in the spindle for a knockout bar/ vac chuck.
     
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  5. Justin Pierce

    Justin Pierce

    Joined:
    Feb 26, 2020
    Messages:
    10
    Location (City & State):
    Butternut, WI
    Thanks Doug!
    I'm leaning back towards just a threaded shaft again now. I wasn't sure if I had been overlooking other chuck options.
    But now my other problem is my metal lathe doesn't have a big enough through bore, I might be able to us the one at work though.
    I'm not looking forward to doing the morse tapers for the headstock and the quill. I'm more of a farmer level machinist than a tool and die level machinist, so I'm pretty slow at it.
    I have a good chunk of the material on hand, I think I might have a 3 phase motor and a VFD even, but I'm still not fully convinced this is a road I want to go down.
    Just because I can doesn't necessarily mean I should................
     

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