Anti backlash lead screw example design

This is a example how to make a anti-backlash lead screw using 2 nuts and this printed part.

The example shown uses 2 m5 nuts and a spring.

I have included the CAD file for you to examine in DesignSpark Mechanical.
Basically you will only slightly tighten the 2 nuts together so that the free play is taken out and then insert into the nut capture. Too tight and it will have a lot of friction.

This design has more drag than ball screws so you will need to use a light lubricant. Preferably containing teflon.

You will have to draw a new CAD file with the appropriate bolt holes for mounting and for your particular size threaded rod.