Technic, Axle 4L - 3705

The LEGO® Technic Axle 4L (3705) is a four-module-long axle designed to connect compatible Technic components and transfer rotational movement between mechanical parts. Its cross-shaped profile fits Technic axle holes, making it a useful element for building and repairing LEGO mechanisms.

LEGO Technic Axle 4L – Product Details

• Part number: 3705
• Length: 4L (four LEGO modules)
• Design: Straight axle with a cross-shaped profile
• Colours: Multiple colours available, including Black and Red
• Compatibility: Designed for LEGO Technic components with cross-shaped axle holes

For Technic Vehicles and Moving Mechanisms

Need a replacement axle for a gearbox, wheel assembly or custom mechanical build? The 4L length provides a useful option for connecting gears, wheels and other compatible components where a shorter axle would not reach.

Unlike Technic pins, which are primarily used to connect elements, this axle can transmit rotation through compatible axle-hole components. Its straightforward design makes it a versatile addition to a collection of spare LEGO Technic parts.

Explore our LEGO Technic parts collection for more axles, gears, pins and building components.