Build a Universal Single Board Computer Rack Mount System
Introduction
Print the Required Parts
Assembly Instructions for the Chassis Bays
Assembly Instructions for the Chassis Bays
Next Steps

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About this Learning Path

Skill level:  Introductory
Reading time:  2 hrs
Last updated:  13 Aug 2026
Skill level:
  Introductory
Reading time:
  2 hrs
Last updated:
  13 Aug 2026
Author:Gabriel Peterson, Arm
Arm IP:Cortex-A
Tags: Embedded Linux Linux Fusion 360
Author:
  • Gabriel Peterson, Arm
Arm IP:
Cortex-A
Tags:
Embedded Linux Linux Fusion 360

Who is this for?

This is an introductory topic for software developers and hobbyists who want to build a rack mount system for housing single board computers.

What will you learn?

After completing this Learning Path, you'll be able to perform the following tasks:

  • Acquire and print the required materials.
  • Assemble and install the universal SBC rack mount system in a 4U chassis.
  • Install single board computers in the racks.

Prerequisites

Before starting, you'll need the following prerequisites:

  • 3D printer
  • Hack saw or chop saw to cut threaded steel rods
  • 4U server chassis with the insides removed. For example, Rosewill RSV-L4500 4U Industrial Rack-Mount Server Chassis
  • 8-32 stainless steel threaded rods at least 405 mm long. 4 x 405 mm long rods are also required for each bay row. Example part
  • 8-32 stainless steel hex nut. 8 per bay row. Example part
  • 8-32 stainless steel wing nut. 8 per bay row. Example part
  • #8 stainless steel washer. 8 per bay row. Example part
  • 18-8 stainless steel socket head screw. 4 per card. Example part
  • 18-8 stainless steel hex nut. 4 per card. Example part
  • PETG filament. Others can work, but PETG allows some flex without the risk of snapping

Summary

AI-assisted

This summary was drafted with an approved AI-assisted workflow and reviewed by Arm contributors before publication. Human technical review remains part of the process so the final page reflects engineering rigor, accuracy, and Arm editorial standards.

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You’ll build a universal single-board-computer rack in a 4U chassis using 3D-printed parts and common hardware. First, you’ll print PETG bay bodies and covers, prepare stainless threaded rods, and assemble modular bay rows. Then, you’ll mount a board on a card plate with bolts and standoffs, align it with the grip edge, and slide it into a bay.

Frequently asked questions

AI-assisted

These FAQs were drafted with an approved AI-assisted workflow and reviewed by Arm contributors before publication. Human technical review remains part of the process so the final page reflects engineering rigor, accuracy, and Arm editorial standards.

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Which filament should I use for the printed parts and why?
Use PETG. The card plate tabs need to flex for removal. PETG bends instead of snapping like PLA, is non-toxic, and tolerates higher temperatures than PLA.
How many bay bodies and bay covers do I need to print for each bay?
Print the number of bay bodies required by your chosen spacer size, and print the same number of bay covers. The exact count depends on the spacer size used.
What should I do to prepare the threaded rods before assembly?
Wash the grease off the rods with soap and hot water. This prevents the build from becoming greasy during assembly.
What length should I cut the threaded rods to?
Cut each rod to 405 mm. A chop saw is recommended, though you can use a hacksaw.
How do I mount an SBC to the card plate and install it in the rack?
Place bolts through the SBC and add standoffs on the back. Align the board so its back edge is flush with the grip side of the card plate, then tighten hex nuts. Slide the assembled card and plate into a bay slot.
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