Wednesday , December 13 2017
Home > Lathe Projects > Free Metalworking Project Plans: Machinist’s Screw Jack (Lathe)

Free Metalworking Project Plans: Machinist’s Screw Jack (Lathe)


Material: Steel
Units: (in)

After the Spring Center and the Soft Faced Hammer, the next lathe project I tackled was a set of  Screw Jacks. Why? Well, to create my jacks I had to build on my tapping and single point threading skills, both of which needed some work.

The project took several tries because during the threading process I kept setting the cross slide at 29.5 degrees from the centerline of the part, rather than 29.5 degrees from perpendicular to the centerline of the part. My threads kept coming out looking like buttress threads. I was so frustrated!

But once I figured out what I was doing wrong, my project progressed nicely. I don’t have a set of plans available for you to build my own, but I did find a set of plans by James Appleby for making a much simpler version of the ones I made. I’ve attached the plans below. Be sure to visit the Home Metal Shop Club for this project and other great project ideas.

If you’d like a set of plans for my jacks, leave a comment. If there’s enough interest maybe I’ll create a set of plans for them.

  Machinists_Screw_Jack.pdf (331.8 KiB, 8,106 downloads)
NOTE: You need to be a registered member (and logged in) to download this file.

  • HOW? You can register using the yellow "Register" link in the upper right corner of the website. If you've registered previously you just need to log in using the "Have an account? Log In" link located in the upper right corner of the site.
  • COST? It's currently free to register and become a member of this site.
  • PRIVACY? Your email address will be encrypted and kept private.


  • BENEFITS? Registering for the site allows you to download plans and other documents. Registering will also grant you forum access, allowing you to log into the forum using the same username and password you used to register for the site.
  • RSS? Subscribing to the RSS feed or subscribing to receive email messages whenever the site content is updated is not the same as registering. If you would like to receive email notifications you still need to sign up for that service. AND WE STILL WON'T SPAM YOU! We will, however, send you an email whenever the site is updated with new content. That's typically about 1 email a month or less.

[adrotate group="4"]

About Tyler

Tyler is a hobby machinist and 3D printing aficionado. He teaches computer programming and web development at Highline College near Seattle. Tyler founded Projects In Metal in 2008 because he was frustrated by the lack of free plans available for hobby machinists.

Check Also

Creating a Custom Tap for Uncommon or Proprietary Threads

How to Make a Custom Tap for Uncommon or Proprietary Threads

Have you ever needed a special size nut with uncommon or proprietary threads? Recently, I …