The rollers were designed in a 3D program, Rhinoceros. They were printed on a high-quality 3D printer (Object Connex500) with Vero Black plastic. You can print the rollers on any 3D printer, or turn them on a lathe.
2. Insert a flanged bearing into both the top and bottom of each roller.
3. Slide the rollers on to the posts. The sprocket roller should be placed on the post immediately to the right of the main gate assembly.
4. Add a bearing shim on top of the flanged bearing and add a hex nut to hold the roller in place. Do not tighten.