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Thread: 3520B indexing

  1. #1

    3520B indexing

    Anyone ever use the built-in indexing capabilities on the 3520B lathe?

    If yes.. use to do what -- specifically what (like flutes on spindles)
    If yes.. How do you do it?
    If yes does your lathe have slop when pin is installed?

    any help would be appreciated.
    Remember the tea kettle - it is always up to its neck in hot water, yet it
    still sings!

  2. #2
    Join Date
    Oct 2006
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    I've only used the index pin on rare occasions to hold a piece in one place while I power sand it. I've noticed there's a bit of slop in it unless I screw the pin in all the way, but for sanding it's not really an issue.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  3. #3
    maybe an indexing plate would just be better..

    thanks for the reply.

    paul
    Remember the tea kettle - it is always up to its neck in hot water, yet it
    still sings!

  4. #4
    Paul,

    I have used mine on a cherry pedestal table that I'm making for my wife. It has 3 legs that are 120 apart. The legs are dovetailed into the turned pedestal. I built a "jig" / Box out of plywood. The bottom had a flange that fit snuggly between the ways of the lathe and a wooden "washer" with a bolt that held it in place on the lathe. The box had two different "tops" with different sized slots cut into one end. One slot was wider and I installed it and and used a straight cutting bit and put flat surfaces 120 apart at the bottom of the center spindle. Then I removed that one and installed the 2nd one and used a dovetail bit to put dove tails within a portion of the "flat spots".

    I used a box to route dovetails into a turned pedestal. The dovetails were 120 apart. Then I cut the pins on the legs buy using the same bit in my router table.


    I hope this makes sense.

    I bought Norm's plan for Martha Washington's candle stand and used his methods to make it.

    When I get the finish appled, I'll post it here. I'm in the process of appying the finish.
    Ken
    ------



  5. #5
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    Quote Originally Posted by Paul Gallian View Post
    maybe an indexing plate would just be better...
    In what way?
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  6. #6
    Ken,

    Thank you -- I am doing the same type of thing but I am calling mine a shaker table -- My mother-inlaw has a table that I stole the measurements from-- hers is maple and mine is walnut. all is done but the leg attachment.

    Your suggestion has helped -- l like the dovetail way -- I was going to just use the mortise and tenon approach...

    paul
    Remember the tea kettle - it is always up to its neck in hot water, yet it
    still sings!

  7. #7
    Vaughn,

    I was thinking about something like this.
    I am just exploring ideas what do you think..?
    Last edited by Paul Gallian; 12-19-2010 at 09:45 AM.
    Remember the tea kettle - it is always up to its neck in hot water, yet it
    still sings!

  8. #8
    Join Date
    Oct 2009
    Location
    Bradford, Vermont
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    425
    Quote Originally Posted by Paul Gallian View Post
    Vaughn,

    I was thinking about something like this.
    I am just exploring ideas what do you think..?
    I think... those tend to be pretty expensive compared to a turned plywood wheel with a broken bandsaw blade wrapped around it, or with index holes drilled in it at the angular spacing you want...

    ...but then I'm pretty strongly oriented to DIY.

    Wheels like the one shown are nice & pretty, but indexing is pretty easy to accomplish. with that many index holes, too, counting the dang things can get tedious.

    How many different index divisions are you likely to use? Twelve index holes (30 degrees) will get you two, three, four, and six, and twelve divisions. Twenty-four (15 degrees, like the inner ring of holes on that plate) will also give you eight and twenty-four divisions. The plate shown has 72 holes in the outer ring, which doesn't buy you much over 24; 72 can only be divided by 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36, (adding only 9, 18, and 36).
    -- Tim --

  9. #9
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    Quote Originally Posted by Paul Gallian View Post
    Vaughn,

    I was thinking about something like this.
    I am just exploring ideas what do you think..?
    I still don't see how this is substantially different than using the built-in indexing holes. Perhaps the plate makes it a little easier to see what compass position the lathe is at, but for something like a 3-legged table, it seems it'd be pretty easy to figure out the three spots without it. If you just need it to see the reference points, a couple minutes with a compass and a paper plate would get the same result.

    Far be it from me to talk someone out of a tool purchase, but for a 3520b owner, the indexing plate seems to be a solution without a problem to use it on.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  10. #10
    Join Date
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    Location
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    ...and if there's a little slop in the pin... a Quick-Grip clamp will hold the spindle firmly against the leading or trailing edge of the hole. If the pin is slightly undersized, another slightly larger one could be found...
    -- Tim --

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