10" Mini Rack Mounting Plates and Caddies

I created these mounting system for miscellaneous usage. As of V3 I consider my rack to be finally complete.

Updated (V3): 07.08.2026. Added a front fan plate and a 2U plate that holds a touchscreen.

[V3] 2U Rack display and computer

• The new 2U plate is designed to act as a Rack computer.

• The following components are mounted:

  • Radxa Cubie A7Z (running Armbian)

  • ZDE PCIe 2.5G Ethernet + NVME HAT

  • 5.5" 1080p AMOLED touchscreen

  • M5Stack Finger2 Fingerprint Reader (over UART)

  • USB 3.2 port mounted on the plate allows full access to Cubie's USB C port

  • USB-C OTG Y cable to provide power and touch using the OTG port on Cubie

  • Heatsink are added to nvme SSD and radxa.

• A single 2.5A USB-C seems sufficient to run the whole system.

• The panel mounted USB C is intended for Yubikey based 2FA on data servers.

• Fingerprint sensor is there just for fun and not intended for security.

• The mounting system for the screen is carefully designed to not put stress on the display and seems to hold well.

• The 2U plate prints flat ensuring the display sits on a clean surface. Add supports for the fingerprint sensor.

• The cubie is working well to open websites and several tabs. I haven't hit any limits yet.

• Note that the default Cubie OS image lacks support for many PCIe accessories.

• Keeping on with V2, there's a small area to put a label on the mount.

• I've added an image of the back side of the plate.

[V3] 40mm Fan Caddy

• A 12V 40mm fan can be mounted using M5 screws.

• Mainly intended to fill empty space, however initial tests show slight drop in overall temperature.

• Prints flat with a small plug for my domain -- only visible if a different color is chosen.

[V2] Base Raspberry Pi 5 Caddy

• Allows mounting a HAT, and can be customized to add ports etc.

• Has three holes to add fiber optics (2mm thick) to bring the hidden LEDs to the front. Adapters to hold the optic cable near the LEDs is also provided.

• There is some space for custom labels that can be used to identify the devices. Big enough for thermal printer resolution.

• A pin hole is added with the intention to add an external Power button to the Pi. The existing footprint match KFC-W-13W switches. Requires soldering two wires to the Pi.

• SD Card is now easier to remove compared to previous version.

• Slots, instead of holes, on top give more flexibility in where the caddy is mounted.

• Ventilation holes on the face plate allow cold air to enter the rack and be pulled away by the rear fan.

• Markings on bottom are 0.01mm deep and can be painted in a slicer.

• It is 42mm wide. Somewhat parametric fusion360 file is added where this can be changed (but it's buggy sometimes).

  • To adapt for a taller hat, change the nas_x_off in Sketch 1. The top vent hole isn't perfect so you may need to edit the timeline feature to deselect/select slots.

  • To change the width of the mounting slots, edit nas_slot_w in Sketch 3. The slots are symmetric.

[V2] Radxa 2.5G dual Ethernet and NVME HAT caddy

• Based on the base caddy and fits the HAT perfectly.

[V2] Mount

• The mounting plate is 2U high and has 3mm holes for BT3/M3 screws. 

• Strong and shouldn't normally flex too much.

• Standard 10" rack dimensions, so should fit on any 10" rack system.

• [NEW V2] Added a second plate with holes closer together.

Printing Notes:

• Print all caddies facing down, supports not necessary.

• You can use 0.28mm layers since we don't see anything but the bottom face.

• Specifically for the mounting plate, having 4+ perimeters is good. 30% gyroid infill is ample.

• If you don't have self-threading BT screws, use M2.5/3 screws with nuts on the other side. Also most screws are resisting orthogonal force so even if the M3 screw isn't super tight you won't have much issues.

• If you paint the model in slicer, use arachne minimum feature size of 25% to get it to print the text properly.

V1

Pi5 Geekworm X1004 Caddy:

• Perfect fit, use M2.5 screws to mount Pi5 and a couple of standoffs.

• Watch out for the screw head sticking out (will fix eventually, but is generally not a problem).

Pi4 PiKVM Caddy:

• Designed for Pi4 + Waveshare HDMI-CSI + USB C breakout.

• Uses BT3, BT2.5 screws.

• Uses USB C breakouts for HID and Power.

• Check out the image for wiring.

Wire Comb:

• A comb to pass through wires.

• Snip off or trim the strands if necessary.

(Bonus) 1U Shelf for Cudy 2.5G Switch and M5Stack Mini DIN Meter:

• Use M3 screws to secure the switch to the shelf.

• DIN Meter can be simply snap-fit using the orange mounting ring it comes with.

Note on front panel sizes:

• I am choosing max density over symmetry so the caddies have a specific order.

• You can move the holes position in the f360 file to fit your needs.

Sidenote:

• I used this model for printing my rack: https://www.printables.com/model/1173672-10-mini-rack-all-3d-printable

I use 90deg USB C connectors to ensure the cables don't extend past 2U limits, but it may be necessary to leave a few cm space below.

Since this is a work in progress you may want to change some hole position or front plate size, hence I've included the f360 file.