The various spice racks already on Thingiverse didn't suit my needs so I decided to have a go at designing my own, I had a particular size in mind and wanted a design that used a friction fit so that it could be easily taken apart if ever required.

This design borrows heavily from others available but is well suited to those that have access to metric sized timber strips and dowels from their local hardware store. In my case I used Tasmanian Oak from Bunnings, the Australian equivalent of Home Depot. It is also quite simple to construct so long as you pay careful attention to the size of the timber parts and your printer is fairly accurate.

The shelves are made from 2 pieces of Tasmanian Oak, an 8mm x 20mm length and an 8mm x 30 mm length, glued together along an edge to form a 8mm x 50mm board. The rails are 6mm Tasmanian Oak dowel.

Cut all timber parts to the same length and sand until they fit snugly in the printed parts, the holes for the rails may require a cleanup with a 6mm drill though be careful not to make the holes too big. If the parts are a little loose you could potentially glue them in.

For wider shelves you can print as many 'sides' as you require and slide them along the timber pieces for extra support in the middle.

I have provided the SketchUp file I used to generate the STL for those that would like to have a play around with shelf sizing or adjust for local material sizes.