Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 3 of 3

Thread: ACME thread

  1. #1
    Join Date
    Dec 2004
    Location
    Up North
    Posts
    28

    Question ACME thread

    How do I explain an ACME thread count?
    My lead screw is 0.5" 8tpi 2 start.
    Is that the correct way or do I divide by 2 to get 0.5" 4tpi 2 start?
    TIA
    Every day is better than yesterday

    Cheers
    SAISAY

  2. #2
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    6,216

    Default

    So the pitch is 1/8" but the lead is 1/4"?
    Gold, the colour of choice for the discerning person.

  3. #3
    Join Date
    Apr 2013
    Location
    Toowoomba Qld
    Posts
    401

    Default

    My understanding is you describe it as the total threads per inch x how many starts
    So while a 8tpi 2 start thread is really 2 x 4tpi threads side by side, they are cut using a 8tpi thread form / depth and the total thread count would be 8tpi

    I may of course be incorrect as this is only my understanding of it.

Similar Threads

  1. Replies: 8
    Last Post: 1st Sep 2014, 12:26 PM
  2. ACME thread gauge
    By Grahame Collins in forum METALWORK GENERAL
    Replies: 8
    Last Post: 21st Oct 2012, 08:27 AM
  3. ACME thread chart
    By morrisman in forum METALWORK GENERAL
    Replies: 1
    Last Post: 7th Aug 2012, 09:48 PM
  4. 3/8-12 acme tap
    By rusel in forum METALWORK GENERAL
    Replies: 5
    Last Post: 23rd Mar 2012, 02:39 PM
  5. ACME 1/2 - 8 LH rod available ?
    By morrisman in forum METALWORK GENERAL
    Replies: 32
    Last Post: 1st Dec 2011, 10:22 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
  •