Filament Spool Cart

This is a rolling cart for filament spools that I designed to make use of the space I had available. I wanted it to be able to be modified or expanded in the future if my needs change. It utilizes ½" Schedule 40 PVC pipe for both the upright and horizontal supports. You can make it any size you want by modifiying the pipe lengths and the number of layers. I designed it to hold eight standard spools per layer using 24" (61cm) lengths of pipe. By using 8 5/8" (21.9cm) for the vertical pipes you can fit a Bambu Lab filament box with the label showing. Because I didn't want to glue anything I designed a collar that attaches to the pipes to keep them from shifting horizontally. The hole in the collar is sized for M3 x 6mm socket head screws and nuts. Also included it an optional bin with a removable divider. It takes up about the same space as two spools and can be slid along the pipes. I used casters I already had on hand from an old piece of furniture. They are very similar to the ones fo