10" / 10 inch homelab rack

Open 10" Rack — true EIA-310, fully parametric

A 10-inch mini rack with no solid walls anywhere: skeletonised posts, triangulated frames, honeycomb panels. A full 6U rack comes in around 300 g of filament.

It uses the real EIA-310 hole pattern — 254 mm wide, 1U = 44.45 mm, 236.525 mm pitch, and the proper irregular vertical spacing of 15.875 / 15.875 / 12.7 mm. Off-the-shelf 10" gear bolts straight in, which is not true of the many printed racks built on an evenly spaced hole grid.

Want it to fit your gear?

Open the .scad in OpenSCAD and use the Customizer. Rack height and depth are free numbers, so anything from a 2U desk box to a floor-standing stack works, and bigger printers simply print bigger racks. Taller than your build plate? Print two stacks and join them with one extra frame — it's designed to stack.

The part that really benefits is the device module. Type in your device's width, depth and height, and the module is built around it — including its height in U, which is worked out for you. A 33 mm box gives 1U, a 42 mm box gives 2U, a 90 mm box gives 3U.

The device slides in from the back, its front tucks under a short roof so it can't lift, and two small screwed stops lock it at the rear. Plug a cable in from the front and nothing moves.

Hardware

M6 × 12 button head with thin square M6 nuts (DIN 562) for gear on the rails, M4 × 16 and M4 × 12 for the frame, top shelf and braces. No heat-set inserts anywhere.

⚠ Don't buy a "10 inch rack screw kit". They almost always ship cage nuts — an M6 nut in a sprung metal cage, meant for square-hole cabinets. They won't fit, and stripping the cage off doesn't help. You want plain thin square M6 nuts, 10 × 10 × 3.2 mm, DIN 562. If you can't find them, set nut-type = "hex" in the Customizer before printing the posts and the rail plate thickens to take a normal hex M6 nut.

Printing

PLA is fine; PETG next to gear that runs hot (10G SFP+ modules get seriously warm). 0.2 mm layers, 3–4 walls, 25–40% infill — the parts are already skeletonised, more infill just wastes filament.

No supports. Every part is self-supporting as exported. Turn skirt and brim off for the 254 mm wide parts or they'll run off a 260 mm plate.

One thing to watch: the brush panel's bristles are 0.4 mm thick with 0.8 mm slots. Check in the slicer preview that the slots are still open on layer one — first-layer squish can close them. If so, raise brush_gap to 0.9. This part is superb in TPU if you can print it.

Cable management

Side ducts hook into the post lozenges and run front to back along each side — one for power, one for data. Ring, comb and spool clips slide onto the post edges and index into the same lozenges, so there's a detent every 21 mm and you can move them around without tools or screws. A blank panel and a clip-on top filler close the gaps so the front stays clean.