Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 10 of 10

Thread: 16 TPI thread

  1. #1
    Join Date
    Jan 2008
    Location
    Metford
    Posts
    47

    Default 16 TPI thread

    Hi guys.
    i know I asked this question a long time ago but I'm trying to cut an imperial thread 16 tpi
    the lathe chart asked for a Z gear and I can't rember which one I used last time
    Kim

  2. #2
    Join Date
    Jul 2010
    Location
    Melbourne
    Posts
    9,088

    Default

    I'm guessing you still have an AL-335?
    I assume its metric or you wouldn't need a Z gear
    Got a picture of your threading chart?

    If its the same as mine
    Z gear is 48
    24-120-127-48 A2 MII

    Stuart

  3. #3
    Join Date
    Jan 2008
    Location
    Metford
    Posts
    47

    Default

    Thanks Stuart
    I'll give that a go.
    Kim

  4. #4
    Join Date
    Dec 2011
    Location
    Lancaster, Ohio, USA
    Posts
    100

    Default

    Reminds Me again to be thankful for a QCGB.

  5. #5
    Join Date
    Aug 2011
    Location
    Melbourne
    Posts
    4,779

    Default

    Quote Originally Posted by mcostello View Post
    Reminds Me again to be thankful for a QCGB.
    I'm confussed about this statement. I have what is known as a quick change gear box but I still need to remove/change the back gears from time to time, same as Kim.

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  6. #6
    Join Date
    Apr 2013
    Location
    Bunbury WA
    Posts
    98

    Default

    I have an AL-336 and the Z is 48, i'm trying to upload a photo of the chart but don't know if it's working.
    Attached Images Attached Images

  7. #7
    Join Date
    Apr 2013
    Location
    Bunbury WA
    Posts
    98

    Default

    From the chart it's a 24-127-48. This lathe is imperial. It's about 3 years old.

  8. #8
    Join Date
    Jan 2008
    Location
    Metford
    Posts
    47

    Default

    Thanks Clive.
    The job is done and thank you to all who answered.
    Kim

  9. #9
    Join Date
    Oct 2008
    Location
    Cairns, Q
    Posts
    666

    Default

    Quote Originally Posted by mcostello View Post
    Reminds Me again to be thankful for a QCGB.
    Yes, but....

    I have a modern lathe with QC gearbox. I also have an old 9" lathe which has loose change gears. This is the one I go to for cutting unusual or non-standard thread pitches. It is much more flexible than the modern one for this application. With the help of a few home cut change gears I can cut:

    All common Imperial pitches down to 8 tpi including 19 tpi and 27 tpi, but not 11 1/2 tpi.*
    All ISO metric pitches from 0.5 to 3.0 to an accuracy of 0.02% pitch error or better*
    All common DP threads from 48 to 22 DP to an accuracy of 0.04% pitch error or better*
    Good approximations for all 0 BA to 12 BA threads
    and various non-standard pitches, so there is still a place for the old lathe with loose change gears.

    I have not needed to cut metric module threads yet, but it should be possible.

    * Coarser pitch threads in each of the above systems could be cut, but this would mean over driving the lead screw, which I am reluctant to do. If it really became necessary I would probably arrange to drive the lead screw instead of the headstock spindle. It would really be exceeding the design limits of the lathe though.

    Frank.

  10. #10
    Join Date
    Dec 2011
    Location
    Lancaster, Ohio, USA
    Posts
    100

    Default

    I have a Clausing 8000 series that would cut that range of threads, but no mention of accuracy.

Similar Threads

  1. Best of the Best thread?
    By namtrak in forum FORUMS INFO, HELP, DISCUSSION & FEEDBACK
    Replies: 7
    Last Post: 13th Jul 2010, 05:21 PM
  2. What thread is this?
    By neksmerj in forum METALWORK GENERAL
    Replies: 10
    Last Post: 25th May 2008, 07:29 PM
  3. This Thread Could Be About You!!!
    By sydneyfc in forum FORUMS INFO, HELP, DISCUSSION & FEEDBACK
    Replies: 2
    Last Post: 28th Oct 2007, 09:39 PM
  4. Thread changes?
    By oges in forum FORUMS INFO, HELP, DISCUSSION & FEEDBACK
    Replies: 3
    Last Post: 20th Nov 2004, 01:12 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
  •