Compact Linear Actuator - 3D Printable DIY Mechanism

This project is a compact linear actuator fully designed from scratch and optimized for 3D printing. It is intended for use in DIY projects, robotics, RC systems, and various automation applications.

The actuator converts rotational motion into linear movement using a motor with gearbox and a threaded lead screw, providing smooth and controlled extension and retraction.

The design is focused on simplicity, functionality, and ease of assembly, making it suitable for hobbyists and makers using standard consumer 3D printers.

Design & Construction

The actuator consists of several main parts:

Main box (housing) that contains the motor, gearbox, and internal mechanism Sliding piston (rod) that moves inside the housing Top cover, which encloses the assembly and is secured with 6 screws

Inside the mechanism:

1. A geared motor with a threaded lead screw (55 x 4 mm) is used to drive the piston.
2. Nut 5mm long

Dimensions Collapsed length: 100 mm Extended length: 150 mm

Features Fully 3D modeled from scratch Functional linear motion mechanism Compact and lightweight design Suitable for robotics and DIY automation projects Easy to assemble Optimized for home 3D printers Modular construction for easy maintenance