Dean Smith & Grace problem disassembly the lead screw
Close
Login to Your Account
Results 1 to 6 of 6
  1. #1
    Join Date
    Sep 2009
    Location
    italy rolo re
    Posts
    5
    Post Thanks / Like
    Likes (Given)
    2
    Likes (Received)
    2

    Default Dean Smith & Grace problem disassembly the lead screw

    The half nut no longer engages the lead screw and I am unable to thread on my lathe.I tried to disassemble but I cannot remove the lead screw.
    Any suggestion on how to greatly appreciated
    Filippo

  2. #2
    Join Date
    Jun 2006
    Location
    Thunder Bay Canada
    Posts
    1,891
    Post Thanks / Like
    Likes (Given)
    601
    Likes (Received)
    343

    Default

    While I am not familiar with your make of machine I don't think you need to remove the lead screw to solve this problem. There's something amiss in the lathe carriage that you should be checking.

  3. Likes FilippoMo liked this post
  4. #3
    Join Date
    Aug 2005
    Location
    Toronto
    Posts
    5,680
    Post Thanks / Like
    Likes (Given)
    3767
    Likes (Received)
    4460

    Default

    If you can't get it apart to a shot at fixing it it, advice can only be live with it or scrap it. Why can you not remove the leadscrew? can you get it out of the gear box shaft (its pinned there)? hard to make suggestions without more detailed info. Normally, to get the the leadscrew off, take the right block off supporting the leadscrew, take out the pin that holds it to the gear box shaft and it should pull.

  5. Likes FilippoMo liked this post
  6. #4
    Join Date
    Sep 2009
    Location
    italy rolo re
    Posts
    5
    Post Thanks / Like
    Likes (Given)
    2
    Likes (Received)
    2

    Default

    Thank you very much for your answers:We followed exactly the procedure as described by Mvgyver but the lead screw is stuck.We also followed the suggestion of 706jim and we could remove the whole apron and trying to figure out what went wrong with the half nut:there are some thread damaged but the problem is elsewhere.
    Thank again
    Filippo

  7. #5
    Join Date
    Aug 2005
    Location
    Toronto
    Posts
    5,680
    Post Thanks / Like
    Likes (Given)
    3767
    Likes (Received)
    4460

    Default

    you kind of have to get the leadscrew disconnected from the gearbox to remover the apron.

    So the pin connecting the leadscrew to the gear box shaft is out, correct? you can move the carriage left/right and the lead screw stays put, correct? (i.e. the lead screw is not some how stuck in the apron).

    If the above is true, and its put together like mine, I would fashion a slide hammer onto the right end, or even a clamp attached to the right right you tap with a hammer. Start with very little hits - when disassembling I've learned that hundred and hundreds of tiny hits works really well - as well as dozen major blows and doesn't destroy everything in the process. Then the leadscrew just slides out of the apron

  8. #6
    Join Date
    Sep 2009
    Location
    italy rolo re
    Posts
    5
    Post Thanks / Like
    Likes (Given)
    2
    Likes (Received)
    2

    Default

    Quote Originally Posted by Mcgyver View Post
    you kind of have to get the leadscrew disconnected from the gearbox to remover the apron.

    So the pin connecting the leadscrew to the gear box shaft is out, correct? you can move the carriage left/right and the lead screw stays put, correct? (i.e. the lead screw is not some how stuck in the apron).

    If the above is true, and its put together like mine, I would fashion a slide hammer onto the right end, or even a clamp attached to the right right you tap with a hammer. Start with very little hits - when disassembling I've learned that hundred and hundreds of tiny hits works really well - as well as dozen major blows and doesn't destroy everything in the process. Then the leadscrew just slides out of the apron
    WE could get the apron disassembled and I did find out what the problem is:the half nut grew in size and was locked solid in the apron mortise.I scraped the two halves and I am going to use the mortise as a master once I can slide them in.
    We did attempt to make an extractor for the lead screw but we failed to remove it and it doesn't matter at this point in time.
    Thank you
    Filippo


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •