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Re: [atlas_craftsman] Tail Stock Needed

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  • Daniel Logue
    It is original but I m looking to replace the whole thing. Will any Atlas 12 tailstock work? ________________________________ From: wa5cab@cs.com
    Message 1 of 39 , May 2, 2012
      It is original but I'm looking to replace the whole thing. Will any Atlas 12" tailstock work?



      ________________________________
      From: "wa5cab@..." <wa5cab@...>
      To: atlas_craftsman@yahoogroups.com
      Sent: Tuesday, May 1, 2012 3:07 PM
      Subject: Re: [atlas_craftsman] Tail Stock Needed


       
      The 3991 is almost the same as the final 12X36 cabinet model built by Atlas
      and was in production from 1957 to 1967. I have the later nearly identical
      3996 made from 1967 to 1981. The tailstock for the 3991 and 3996 (and some
      other models) are the same. It can be identified or differentiated from
      the one for all Atlas 12" built prior to 1957 by having the clamping bolt on
      the back side of the tailstock casting (i.e., not visible from the working
      side of the lathe). The 10" and all of the earlier 12" have the bolt on the
      front (visible) side.

      There were at least the correct tailstocks listed on eBay last night.

      And the 3996 has a 12" swing, not 6". US practice is to rate the swing as
      the diameter (not radius) of the largest part that you can swing over the
      carriage arms.

      Your post says that the "tailstock base" is not original. Does that mean
      that the actual tailstock is? I haven't seen the late base alone for sale,
      but one could turn up. Last night I bought an early 10"/12" base alone but I
      am assuming that it will not fit the later tailstock.

      Scott mentioned what happens to be the book method for aligning the
      tailstock and headstock (turning a test piece between centers and adjusting the
      tailstock sideways until there is not taper). Another quicker method is to use
      an alignment mandrel and carriage mounted dial indicator. But decent
      quality mandrels are moderately expensive.

      In a message dated 05/01/2012 15:44:58 PM Central Daylight Time,
      danolog16@... writes:
      > I'm working with an Atlas 12" x 36" Lathe, Model 3991 Serial No. 001658
      > (6" swing, 54" bed) for use in making small aluminum parts.
      >
      > The lathe was probably made between 1950 and 1970 and needs some
      > maintenance. The major deficiency is that the tail stock base is not original, has
      > no gibs (is loose in the ways) and cannot be easily aligned with the head
      > stock.
      >
      > I'm looking to buy a new tail stock and have some general questions:
      >
      > What size tail stock should I be looking for?
      > Are the gab between the ways a standard distance for all Atlas lathes?
      > How do I ensure proper spindle alignment?
      >
      > Thanks- Dan

      Robert Downs - Houston
      wa5cab dot com (Web Store)
      MVPA 9480

      [Non-text portions of this message have been removed]




      [Non-text portions of this message have been removed]
    • db45acp
      Dan, Did you find a complete tailstock for your lathe yet? Let me know as I may have one I can let go. Contact me directly, off list. Dan B
      Message 39 of 39 , May 14, 2012
        Dan,
        Did you find a complete tailstock for your lathe yet?
        Let me know as I may have one I can let go.
        Contact me directly, off list.
        Dan B

        --- In atlas_craftsman@yahoogroups.com, "danolog16" <danolog16@...> wrote:
        >
        > I'm working with an Atlas 12" x 36" Lathe, Model 3991 Serial No. 001658 (6" swing, 54" bed) for use in making small aluminum parts.
        >
        > The lathe was probably made between 1950 and 1970 and needs some maintenance. The major deficiency is that the tail stock base is not original, has no gibs (is loose in the ways) and cannot be easily aligned with the head stock.
        >
        > I'm looking to buy a new tail stock and have some general questions:
        >
        > What size tail stock should I be looking for?
        > Are the gab between the ways a standard distance for all Atlas lathes?
        > How do I ensure proper spindle alignment?
        >
        > Thanks- Dan
        >
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