Verified mechanical dimensions for the KrakenSDR enclosure and the official Raspberry Pi 5 case, traced back to manufacturer drawings. These were hard to find — record them here rather than re-deriving them.
For Agents
Every number below comes from a manufacturer drawing, not from a forum post or a measurement. If a future model needs Kraken or Pi 5 geometry, start here. The primary consumer is carbox-enclosure-geometry-spec.
KrakenSDR
Source: drawing KH-ASSEMBLYC1, github.com/krakenrf/krakensdr_docs → drawings/KrakenSDR.Enclosure.Drawing.NEW.png
| Dimension | Value |
|---|---|
| Overall body | 177.3 × 113.5 × 25.86 mm |
| Fan finger guard | +4.7 mm on top of the 25.86 (so ~30.6 mm total stack) |
| Finned body (heatsink section) | 167.2 × 104.5 mm |
Bottom mounting holes — 8× M3
The Kraken’s own M3×12 case-assembly screws are the mounting points. There is no separate mounting pattern — you reuse the screws that hold the Kraken’s case together.
| Axis | Pattern |
|---|---|
| X pitch | 162.6 mm (2 columns) |
| Y positions | ±44.4 and ±22.85 from centre — 4 rows, 88.8 mm total span |
Longer screws are mandatory
Mounting the Kraken this way means the screw must now pass through your enclosure floor as well as the Kraken’s own case. The stock M3×12 is too short — use M3×16. Failing to swap them means the Kraken case itself is only partly engaged.
Connector faces
| Edge | Connectors |
|---|---|
| One long edge | 5× SMA, CH0–CH4, 27.9 mm pitch, the group offset −1.7 mm from the body centreline |
| Opposite long edge | POWER, DATA, PWR, NOISE — the NOISE SMA sits at +69.1 mm from centre |
The −1.7 mm offset is real
The SMA bank is not symmetric about the body. A cutout row centred on the box will be 1.7 mm out. This is the kind of detail that only shows up after the print.
Official Raspberry Pi 5 Case
Source: datasheets.raspberrypi.com/case/case-for-raspberry-pi-5-product-brief.pdf
| Dimension | Value |
|---|---|
| Overall | 98.5 × 70.3 × 33 mm |
The case has no external mounting feature
The only fixing points are stacking holes in the underside of the base, which line up with the board’s hole pattern — not with anything on the case’s outside. To fix the case down you go through the case base into the board pattern.
Raspberry Pi 5 Board
Source: datasheets.raspberrypi.com/rpi5/raspberry-pi-5-mechanical-drawing.pdf
| Dimension | Value |
|---|---|
| Board | 85 × 56 mm |
| Mounting holes | 2.7 mm dia, on a 58 × 49 mm pattern, 3.5 mm in from each edge |
| Fastener | M2.5 |
The board's position inside the case is not specified
The board hole pattern is known and the case outline is known, but the datasheets do not pin down exactly where the board sits within the case. carbox-enclosure-geometry-spec absorbs this by slotting the Pi mounting holes ±2 mm along X (2.8 × 6.8 mm obrounds) rather than using round holes.
12 V Power Bay Components
12 V → USB adaptor
| Dimension | Value |
|---|---|
| Body | Ø28 × 40.5 mm cylinder |
Cradled by twin ribs with Ø28 mm bores rather than a single clamp — one bore lets a cylindrical body pivot; two spaced bores constrain it in two planes with no extra hardware. See Power Bay.
Status LED — a measurement trap
24.4 mm is the LED's OVERALL LENGTH INCLUDING LEADS — not a panel dimension
The part is a singular pre-wired 12 V LED with a 6.5 mm sleeve. The only figure that touches the panel is the 6.5 mm sleeve diameter.
v1 of the enclosure read 24.4 × 6.5 as a window and modelled a rectangular cutout with a rectangular collar. That was wrong, and it is the kind of error a render cannot show you.
| Figure | What it actually is |
|---|---|
| 6.5 mm | sleeve diameter — the panel-mating dimension |
| 24.4 mm | overall length including the leads |
| Ø6.6 mm | the bore to model: 6.5 sleeve + 0.1 clearance |
| Ø14 × 4 mm | round collar behind the wall, for grip |
Generalise it
When a small pre-wired component quotes two numbers, check which one is the body/sleeve and which is the overall length with leads before treating the pair as a rectangle. Panel-mount LEDs, thermistors and pushbuttons are all quoted this way.
Print Envelope
| Printer | Build volume |
|---|---|
| Bambu Lab H2S | 340 × 320 × 340 mm |
Relevant because the enclosure’s 312 mm long axis clears 340 mm without any diagonal placement trick — see Print.
Related
- krakenpi-carbox — the enclosure project these feed
- carbox-enclosure-geometry-spec — the model built from these numbers
- 2026-08-12-krakensdr-doa-rig — the electrical/software side of the same KrakenSDR
- 3d-printing — the H2S the box prints on
- fusion360-mcp-scripting — the verification discipline that caught the LED misread