Box joint jig gear comination spacing table calculator

This page allows you to enter the gears you have for your screw advance box joint jig and generates a table of all the possible increments you can get with your gears. If you are using metric threaded rod, please enter the pitch in the "mm/turn" field.

Primarfy gear set:

Secondary gears:

Thread size:
TPI    mm/turn

Maximum crank turns:

Javascript not enabled!

If you are using Internet Explorer, click on the light yellow bar that shows up at the top of the page
and select "Allow blocked content" to allow the JavaScript table generator program in this page to run.