Return to the Metalworking Forum | Post a Follow-Up

How to cut double threads?

Posted by terry76 (My Page) on
Sun, Nov 12, 06 at 13:46

I was needeing to know how to cut double threads on a engine lathe. If anyone can help I would greatly apprecate it.

Thank You,

Follow-Up Postings:

RE: How to cut double threads?

Double Start Thread
Not sure when done last but hope I get it right?
On some machines there is a easy way to turn a gear, especially good for more starts like 3 or 4 but moving the tool with compound works too.
Lets assume.... when looking at the bolt [thread] and checking with the thread gauge for pitch and it will show
"8"...8 threads per inch, .125 pitch, this is half, so you are actually cutting 4 threads per inch, when done, move the tool over on your compound by .125" to be between the thread you have cut and start cutting second thread.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Metalworking Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here