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Looking for threaded tail stock

Discussion in 'Getting Started' started by Jim Bennett, Oct 14, 2018.

  1. Jim Bennett

    Jim Bennett

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    Hi all - pretty new to turning and am wanting to try duplicating a hollow vessel that is shown in the book “The Fundamentals of Wood Turning” by James Rodgers. I have a Nova 16-24 II lathe that uses a 1-1/4” thread on the headstock. The author shows making the vessel in two parts, with half on the headstock and one on the tailstock. That allows the latter to be easily placed on the headstock later on.

    Well, my question is where to get a “live center with lathe threads” that will fit the 1-1/4” Nova headstock?
     
  2. Bill Boehme

    Bill Boehme Administrator Staff Member

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    I haven't looked at the article yet, but there are several live centers with ¾ X 16 threads (Oneway, Robust, Powermatic) and at least a couple sources for adapters (Oneway and Best Wood Tools). There are probably alternate ways of accomplishing this task, but these are tools that you will find useful for many other projects in the future.
     
    hockenbery likes this.
  3. Mike Johnson

    Mike Johnson

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    If you can't find a live center for the tail stock with matching threads you could find a threaded bushing adapter that has a female thread that screws onto the live center adapter and has the male thread that matches your head stock thread. These are usually readily available as lathe chuck bushings that are made to adapt to various threads used on wood lathe spindles to accept different makes of chucks.
     
  4. Mark Jundanian

    Mark Jundanian

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    There is this item at the Nova web site.
    Although the description talks about it working in live mode, it does not look like it rotates, so not sure how that works. Maybe you need to mount it to a live center?

    https://www.teknatool.com/product/nova-tailstock-adaptor-chuck-accessory/

    Maybe call them. Teknatools answers its phone, unlike more and more companies these days.
     
  5. Karl Loeblein

    Karl Loeblein

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    Here's how to get a live center with 1 1/4 x 8TPI threads that rotates, but it requires buying these two parts.

    This PSI Live Tailstock Chuck Adapter for $34.95 which only comes in 1"x8TPI size. Oddly PSI doesn't sell a version with 1 1/4 x 8TPI threads, or provide an adapter for upsizing this to 1 1/4.
    PSI_Live_Tailstock.jpg
    Crafts Supplies sells the upsizing adapter Turners Select Spindle Adapter 1"-8 TPI to 1-1/4"-8 TPI for $21.95, but it's currently out of stock until Oct. 31. This upsizing adapter is hard to find and can go out of stock quickly. Get this ordered as soon as it's back in stock, or see if you can get one placed on back order.
    ts_spi_ada_1_8_tpi_to_1_1-4_8_tpi.jpg
    Note: Any chuck or adapter which can be spun off should be drilled and tapped for a set screw if you plan on running the lathe in reverse.

    You might find other uses for these items like mounting a 1-1/4" chuck on a mini-lathe having 1" spindle threads. Also, several turners use the PSI Live Center for reverse mounting a bowl onto a vacuum chuck like this example:
    ReverseChucking.jpg
     
    Mark Jundanian likes this.
  6. Jim Bennett

    Jim Bennett

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    Thanks guys - I think these suggestions will do what I need.
     
  7. Mark Jundanian

    Mark Jundanian

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  8. RichColvin

    RichColvin

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    When they state, “perfect alignment”, all I can say is “bwa ha ha ha”. Moving threads to threads won’t give that. Moving a Morse taper to Morse taper gets much better, but not perfect.
     
    Dennis Weiner and Bill Boehme like this.
  9. Bill Boehme

    Bill Boehme Administrator Staff Member

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    That's right. Threads are for fastening, not alignment. Machine tapers are used when accurate alignment is needed.
     
    Dennis Weiner likes this.
  10. john lucas

    john lucas AAW Forum Expert

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    I have the Oneway threaded adaptor and it works great for putting stuff on the vacuum chuck. I also have the Bestwoodtools adaptor that is not a live center, it has a #2 morse taper on one end and your thread size on the other. These adaptors align things well enough. What throws things off is the rubber vacuum seal on the vacuum chucks. I have tried at least 4 or 5 different materials and all will compress just a little and throw the bowl off. Not really much of a problem because I'm usually turning the foot and can blend in any offset in the first 1/2" or so outside the foot.
     
    Bill Boehme likes this.
  11. Larry Copas

    Larry Copas

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    Its nice to have a metal lathe in the shop. My adapter is machined so the threads stop an 1/8" short of the seat. That 1/8" is smooth and machined .001 under the chuck diameter. Than the chuck seats against the flat portion. I put three bearings in to insure it runs true. To my surprise there was a little run out but it doesn't hurt anything. Aim small and miss small, but I can always blame the tailstock.

    DSCF9021.JPG
     
  12. Karl Loeblein

    Karl Loeblein

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    Bill, Rich, The Turners Select Spindle Adapter was the only off the shelf solution that I could find for making a 'live center' with 1 1/4 x 8 threads as the original poster requested. A dead center must be removed before truing up the piece, but a live center can be left on for a period to help with safety (turning between centers). I really think the adapter route would work decently enough until Larry can get his live center into the market. :)
     
  13. Leo Van Der Loo

    Leo Van Der Loo

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    Here is the original Oneway treaded end live center (there are clones/copies) and an adaptor from Oneway, (they sell a slew of different tread size adaptors)

    live center set.jpg Oneway center adaptor.jpg
     
    Last edited: Nov 9, 2018
  14. Karl Loeblein

    Karl Loeblein

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    Leo, I was surprised to see the adapter cost $45 which doesn't seem like much compared to their Live Center package ($110). Still it's nice to see this other option especially if you already have or need the Live Center. Thanks for sharing the pics.
     
  15. Gary Beasley

    Gary Beasley

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    I found the weight of the piece causes the whole assembly to sag just a bit so when I vacuum chuck it can get off center. The last one I did I picked up on the bowl as I contacted the chuck and got a much better alighment. Apparently the sag was in the live centers bearings.
     
    Clifton C likes this.
  16. RichColvin

    RichColvin

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    Has anyone used the Oneway live center adapter on a Powermatic lathe? It looks really great, & I’m interested in feedback.

    Rich
     
  17. Clifton C

    Clifton C

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    Rich, my adapter is from Bestwoodtools.com used on the O/W live center knockoff. Lathe is a 3520A. My method is to put the bowl or plater face down on the bench (chuck still attached) then screw the live center with adapter to the chuck, then put that into the tailstock and bring it up to the vacuum bell without the vacuum on. Power on to spin the bowl, then advance and retract the quill ever so slightly till the bowl finds its center and runs true, sometimes it takes a few tries, then turn on the vacuum. The vacuum might pull the live center out of the quill so you may have to take up the slack. Most of the time this works, if not, I just bump the bowl into position with the heel of my hand. I think Gary's right about the sag.
     
    Last edited: Nov 10, 2018
  18. RichColvin

    RichColvin

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    I just wondered if it generally works well or not.
     
  19. Clifton C

    Clifton C

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    It works to get you really close, if really close is good, you're done. If you need really really close, or really really really close, it needs operator input...
     

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