Modular EU Flush Mount Tool Ø68 mm (71 mm spacing)

⚡ A modular alignment tool for installing EU flush-mounted electrical boxes Ø68 mm with standard 71 mm spacing.

Inspired by professional electrician tools like the Indevice Power Ad — redesigned as a durable and fully 3D printable system.

Why I Designed This

The idea came from my brother, who works as an electrician. He showed me a professional positioning tool used during flush box installation.

The tool worked great — but was very expensive.

So I decided to create a practical 3D printable alternative designed for real installation work.

Key Features

• no need to screw boxes into the tool
• supports horizontal and vertical layouts
• fully modular construction
• expandable for any number of boxes
• laser alignment reference points
• durable enough for job-site use
• simple and fast assembly

Modular System

The tool is built from modular frames and connectors, allowing flexible configurations depending on the installation scenario.

The frame design also includes reference points for laser alignment to help position multiple boxes in a straight line.

Optional bubble level addon available.

Optional Addons

Bubble Level Addon

Supports two bubble levels:

• 12 mm × Ø5 mm

Required Hardware

Each Frame

• 2 × M6 nuts

Tool Ends

• 1 × M6 nut

Knob

• 1 × M6×45 socket head screw
• 1 × M6 lock nut
• 1 × M6 cap nut (optional)

Recommended Print Settings

⚠ PETG recommended

Designed for workshop and on-site usage.

Suggested settings:

• 0.2 mm layer height
• 3 wall loops
• 15% infill

Development Process

This project went through many prototype iterations before reaching the final version.

Early designs required screwing boxes directly into the tool, which made installation slower and less practical.

The final system focuses on:

• speed,
• simplicity,
• modularity,
• durability,
• and real-world usability.

💡 If you find this project useful, consider leaving a Boost.