LEGO® Technic Rotation Joint Disk 79505

LEGO® Technic Rotation Joint Disk 79505 is a specialised Technic part with a circular joint body, large integrated pin, ribbed outer edge detail, and shaped connection points for articulated mechanical builds. Its compact disk form makes it useful for creating rotating sections, hinged structures, and reinforced movement points in custom Technic assemblies.

LEGO® Technic Rotation Joint Design

This part has a round disk profile with a central joint connection and moulded support geometry around the pin section. The visible ridged edge helps identify the part visually, while the broad circular base supports compact rotational layouts.

Technic Build Applications

• Articulated mechanical sections
• Rotating arms and jointed assemblies
• Custom machinery details
• Compact hinge-style Technic structures
• Structural movement points in larger builds

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