Kupo Arch Coupler 28mm Stud 38-51mm 150kg

Kupo Arch Coupler 28mm Spigot

The Kupo Arch Coupler provides a 28mm stud for mounting lights and accessories to tube diameters from 38mm to 51mm. It is built from high-tensile aluminum and steel alloy to handle loads up to 150kg. This coupler suits gaffers and riggers who need a low-profile, secure connection for professional studio or location work. It is not for setups requiring attachment points smaller than 38mm or larger than 51mm.

Tube clamp range 38mm to 51mm

The coupler accepts round tubing between 38mm and 51mm (1.5in to 2.0in) only. Its low-profile design keeps the rig compact but limits leverage adjustment compared to longer arms. The 28mm spigot is a fixed receiver; it does not rotate independently of the clamp body. Builders needing continuous panning or tilt directly at the coupler must add a separate head.

Replaces fixed spigots and narrower clamps

This unit upgrades from single-size clamps by covering the full 38mm to 51mm range in one piece. The 150kg rating replaces lighter alloy couplers that bend under heavy heads or large modifiers. The jump is worth it when rigging overhead grids or wind-braced frames where clamp failure risks injury or gear damage. It does not replace combo stands or wall plates where no tube is present.