584,863 active members*
4,976 visitors online*
Register for free
Login
IndustryArena Forum > Mechanical Engineering > Linear and Rotary Motion > Questions on making a self-centering jig
Results 1 to 5 of 5
  1. #1
    Join Date
    Nov 2005
    Posts
    16

    Questions on making a self-centering jig

    hey guys,
    i am looking at a design that needs a self centering jig for aligning parts. i have not had that much experience in capturing parts with anything other than grippers. Essientally, i want a hand crank that closes the jaws towards the center. i cannot purchase a self centering vise due to special needs. i think I know how they work, but just need some verification from someone that has been around them. here is how i think it should go:

    1 shaft: one end has an area to attach a handle followed by right hand threads followed by an idle area followed by left hand threads
    so it would look something like this:

    p----rrrrrrrr-------lllllllll---

    where 'p' is the handle, '-' is idle shaft, 'r' is RH thread, and 'l' is LH thread

    is that correct? if not, could someone please give me some insight as I am under the gun to get a design together.
    Thanks

  2. #2
    Join Date
    May 2005
    Posts
    674
    Yes that will work. You probably want to swap the "r" and the "l" though.

    http://www.nookind.com/acme/AcmeTwinlead.cfm

  3. #3
    Join Date
    Nov 2005
    Posts
    16
    thanks, i greatly appreciate the answer and the link

  4. #4
    Join Date
    Mar 2006
    Posts
    113
    OMG!!!! Do you know how long I have been looking for these???

  5. #5
    Join Date
    Nov 2005
    Posts
    16
    it was a great link. i already downloaded a model and buit my design around it.

Similar Threads

  1. centering rotary table
    By CerveloRod in forum MetalWork Discussion
    Replies: 5
    Last Post: 09-20-2005, 09:38 PM
  2. Self centering fixture
    By Hack in forum Mechanical Calculations/Engineering Design
    Replies: 18
    Last Post: 07-13-2005, 05:09 AM
  3. Help Centering a Conical part.
    By rustyolddo in forum MetalWork Discussion
    Replies: 1
    Last Post: 07-11-2005, 01:03 PM
  4. Centering a 4-Jaw chuck
    By gdl357 in forum Mini Lathe
    Replies: 10
    Last Post: 09-20-2004, 11:24 PM
  5. Centering blocks
    By Hobbiest in forum DIY CNC Router Table Machines
    Replies: 4
    Last Post: 02-10-2004, 05:57 AM

Posting Permissions

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