Stackable Server Rack — Tool-Free Mini-PC / NUC / SBC Shelf

A stackable rack that turns a pile of mini-PCs, NUCs, SBCs or other small "servers" into a tidy, well-ventilated tower — with no screws, no hardware and no supports.

How it works

One LEVEL is a stiff honeycomb-vented floor sitting on four fat 18 × 18 mm corner posts. Each post carries a cone peg on top, and every floor has a matching cone socket in each bottom corner. Set one level onto the level below and the sockets self-centre onto the pegs — gravity and the cone are the only "engine", so there is nothing to screw, clip or glue. The four open sides stay clear for cables and airflow, and a continuous retaining rail all round keeps each box from sliding out.

The BASE is four wide feet. A foot is a broad brim + shaft + the same cone peg on top, so it plugs into the lowest floor exactly like another level would, lifting the whole tower ~25 mm off the desk so air can move under the bottom box too.

Load runs straight down the four corner columns: at every joint the upper floor's four post-base rings bear on the four lower post tops, so a tall stack is stable and the cones only handle alignment.

Print

• Floor — print one per device. Flat on the bed, posts point up, no supports.

• Foot — print four (one per corner). Brim on the bed, no supports.

• PLA or PETG, 3+ walls, 15–20% infill (the posts are in pure compression). 0.2 mm layers.

Every dimension lives at the top of the .scad, so you can resize the opening, post height (headroom between levels), floor thickness or the honeycomb vents for a different box in minutes.

Photographed here holding a Mac mini on the top level.