A rather rare large Pultra 1590

Discussion in 'General Engine Discussion' started by sedge, Aug 24, 2013.

  1. Aug 24, 2013 #1

    sedge

    sedge

    sedge

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    I have a Pultra 1590 lathe it came with the original four jaw chuck, three jaw chuck c/w five sets of jaws, two face plates, the Mardrive to suit but only two collets.
    Information for this lathe is rather limited and I hoped that somebody might be able to help me with the following:-
    The thread for the draw bar on the collets?
    The thread for the studs/bolts holding the chip tray to the bench?
    One of the collets has a center in it can this be removed?
    I think I have added some pictures.
    Ken

    1590-1.jpg

    1590-19.jpg

    1590-18.jpg
     
  2. Aug 24, 2013 #2

    sedge

    sedge

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    I have posted pictures of the lathe in kens album1
     
  3. Aug 25, 2013 #3

    bobm985

    bobm985

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    Ken-
    If they are buttress threads, they are probably "D" collets, .394 dia x 1mm pitch. They are used on similar machines like Derbyshire and Levin. If they are conventional threads, they are a special Pultra thread, .388 x 1mm pitch. Info from DeCarle, "The Watchmakers' Lathe".
    Regards,
    Bob
     
  4. Aug 25, 2013 #4

    sedge

    sedge

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    Hi Bob

    Thanks for the reply.

    The 1590 lathe uses 20mm collets after the style of the Schaublin W 20 collet.

    One of the collets I have takes 2 morse taper attachments.

    It is of90mm centre height and will take 15" between centers the bed is 31" and the chip tray is about 3' long it makes the 1750/70 look small.
    Took two of us to carry it!
    Ken
     
  5. Jan 17, 2014 #5

    sedge

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    Just for interest a photo of the 1590 compared to a 1750 1590-20.jpg

    1590-22.jpg

    1590-23.jpg
     

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