This rack and pinion display is part of my collection of mechanical displays.
The pinion is intended to be lightly press-fit onto the shaft. You may need to adjust your print settings to achieve this.
The rack you see in the photos has been printed with the toothed part in yellow and non-toothed part in gray to match the rack bearing track. I used 3 mm washers but I think they’re not needed.
The rack bearing holder holds 4 SE695 or equivalent bearings, secured with 3 mm tapping screws. The difference between screw diameter and bearing inner diameter allows lots of play to adjust bearings to be tight against the bearing track. It is secured to the back plate with 2.6 mm x 8 mm tapping screws.
The bearing holder needs supports. Organic supports are recommended for flat horizontal surfaces. I recommend NOT using supports for the screw holes. The small diameter holes should be tapped to M3.
The stand has cutouts on the corners to help prevent warping. Glue stick and organic supports are recommended for this part. There is also a hole for attaching a 10 mm bolt and nut(s) as needed to ensure the display doesn’t tip forward.
The back plate should be printed with a higher number of top layers if using white PLA to prevent the internal fill pattern from showing thru. I used 8 top layers.
Purchased parts:
Other key parameters:
The author marked this model as their own original creation.