Print 10" 4–10U Draft

PrintableRacks R33D printed 10-inch homelab rack

The cabinet. Four corner posts and a framed top and base, held by one M6 screw per corner. The side panels hold on with magnets and lift off, so the same kit is an open frame or a closed cabinet. It needs 32 small magnets glued in, and posts over 4U come in two pieces. It is a first draft that nobody has printed or load-tested yet; a free 6U print kit is in the builder.

Open this frame in the builder

Opens the “PrintableRacks R3 · 6U · Cabinet” starter build, which passes every check. Opening it replaces the rack saved in this browser.

PrintableRacks R3 rendered from its CAD: four light corner posts with a framed top and base and dark side panels. — Rendered from our CAD. Not printed yet.

Key facts

The PrintableRacks R3 is a printable 10-inch rack frame, designed by PrintableRacks; it is a first draft that nobody has printed or load-tested yet.
It comes in 4U to 10U, with 230 mm of usable depth.
The opening between its rails is 222 mm, for panels 254 mm wide.
At 6U it is about 264 mm wide, 230 mm deep and 309 mm tall as drawn in the builder.
It needs a printer bed of at least 256 mm and about 1,300 g of filament at 6U.
302 of the 359 loose devices in the PrintableRacks catalog fit it on a shelf without sticking out the back.

PrintableRacks R3 specs

Type	Print it yourself (first draft; free 6U print kit in the builder)
Rack standard	10-inch (254 mm panels)
Heights	4U, 6U, 8U, 10U
Usable depth	230 mm
Outer size at 6U	264 x 230 x 309 mm (W x D x H, as drawn in the builder)
Opening between rails	222 mm
Fastening	One M6 screw per corner clamps post, cross beam and side beam together; side panels hold on with magnets. Gear bolts into M6 square nuts held in a printed cassette inside each post
Smallest printer bed	256 mm
Filament	About 1,300 g at 6U
Load rating	None: not load tested yet

PrintableRacks' own design. Print files exist for the 6U build and were checked in software and sliced, but nobody has printed one yet. Use PETG or ASA; PLA softens near warm gear.

Strengths and trade-offs

Strengths

Open frame or closed cabinet: the side panels are held by magnets and lift off without tools
Heights from 4U to 10U; only the posts, side panels and nut cassettes change
Finger grips are moulded into the top beams, so there are no bolt-on handles
Nothing prints on the diagonal: every part lies flat on a 256 mm bed, no supports
No cage nuts and no heat-set inserts

Trade-offs

Not printed or load tested by anyone yet; treat it as a first draft
30 printed parts for 6U and about 60 to 90 minutes to build
Needs 32 small magnets glued in, plus 12 screws and 84 square nuts
Posts taller than 4U are two pieces joined by a splice
Stiffness relies on one screw per corner; the side panels add none

What fits in the PrintableRacks R3?

Counted from the 706-part catalog at the frame’s tallest height (10U) and deepest option (230 mm). Loose devices are checked on the shelf named beside them.

218 rail parts fitof 225 for 10-inch rails
302 loose devices fiton a shelf, of 359 in the catalog
18 stick out the backat 230 mm deep

Fits, for example

Lenovo ThinkCentre Tiny (M720q / M920q)1U on the printed 1U shelf; 47 mm to spare at 230 mm deep.
Raspberry Pi 5 (8 GB)1U on the printed 1U shelf; 174 mm to spare at 230 mm deep.
UniFi Cloud Gateway Ultra1U on the printed 1U shelf; 102.4 mm to spare at 230 mm deep.
Synology DS423+4U on the printed 1U shelf; 7 mm to spare at 230 mm deep.
HP EliteDesk 800 Mini (G4-G6)1U on the printed 1U shelf; 55 mm to spare at 230 mm deep.
Dell OptiPlex Micro (7080 / 7090)1U on the printed 1U shelf; 52 mm to spare at 230 mm deep.

Does not fit cleanly

UGREEN NASync DXP2800Sticks out 1 mm5U on the printed 1U shelf; 230 mm deep frame.
Synology DS224+Sticks out 2.7 mm4U on the printed 1U shelf; 230 mm deep frame.
Synology DS225+Sticks out 2.7 mm4U on the printed 1U shelf; 230 mm deep frame.
MikroTik CRS309-1G-8S+INToo wide272 mm is wider than the 222 mm opening.

Questions about the PrintableRacks R3

Will a 1-litre mini PC fit in the PrintableRacks R3?

Yes. A 1-litre mini PC such as the Lenovo ThinkCentre Tiny (M720q / M920q) (179 x 34.5 x 183 mm) takes 1U on the printed 1U shelf and leaves 47 mm spare at 230 mm deep.

Will a 2-bay NAS fit in the PrintableRacks R3?

Only with an overhang. A 2-bay NAS such as the Synology DS224+ (108 x 165 x 232.7 mm) takes 4U on the printed 1U shelf, but at 232.7 mm deep it sticks out 2.7 mm behind the 230 mm frame.

Can I download and print the PrintableRacks R3?

Yes, at 6U. A free print kit (.3mf, opens in Bambu Studio and other slicers) for the 6U build is in the builder: open the frame, open the Parts list and choose Download print kit; it needs a free account. The kit has a small test piece: print that first. Other heights have no files yet. It is still a first draft, checked in software and sliced, but nobody has printed or load-tested one. The files are free for personal, non-commercial use (CC BY-NC-SA 4.0).

Does the PrintableRacks R3 have a load rating?

No. Nobody has load-tested it yet, so keep heavy gear out until someone has. The builder still adds up the weight of your parts.

Who designed the PrintableRacks R3?

Designed by PrintableRacks. A free print kit (.3mf, opens in Bambu Studio and other slicers) for the 6U build is in the builder: open the frame, open the Parts list and choose Download print kit; it needs a free account. The kit has a small test piece: print that first. Other heights have no files yet. It is still a first draft, checked in software and sliced, but nobody has printed or load-tested one. The files are free for personal, non-commercial use (CC BY-NC-SA 4.0). Open the PrintableRacks R3 in the builder to get it, or see our five frames side by side.

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