Sleeve Coupler
• Axial force transmission: Fastened by double-splicing clamped plate and bolt, transfer axial pressure or tensile to joints two ends.
• Coaxiality mechanism: Built-in positioning protrudes and grooves structure ensure that the axis deviation of the butt tube is ≤1mm, avoiding instability caused by eccentric force.
• Quick dismantlement and assembly: It adopts a wedge-shaped pin design, which is convenient and efficient to install and suitable for assembly line operations.
Product details
The sleeve coupler is a key connecting component used for the butt joints and extension of steel tubes that widely applied in scaffolding and formwork systems. It is composed of two symmetrical clamping plates, bolts, nuts and washers. The clamping plates are connected through a hinged shaft. When closed, it wraps around two butt steel tubes, and the nuts are tightened to clamp the steel tubes. Some models are equipped with wedge-shaped pin in the middle of the plate to ensure that the two butt tube fittings are centered, and the tightening force of the bolts is converted into lateral squeezing force, further filling the gap and enhancing the connection reliability. The inner diameter is usually 48.3mm (compatible with standard steel tubes of φ48.3×3.6mm), and the wall thickness of the couplers is ≥3.2mm to ensure load-bearing capacity.
Standard dimension | EN 74-1 |
Material requirement | Ductile cast iron or stainless steel |
Mechanical property | Tensile bearing capacity is ≥25kN，compression bearing capacity is ≥45kN |
Coaxial deviation | Axis offset ≤1mm, perpendicularity≤0.3° |
Surface treatment | Zinc-nickel alloy coating, salt-spray test over 1200 hours |
Type | Sleeve coupler | Right-angle coupler | Swivel coupler |
Connecting angle | Axis-oriental extension | 90° | 0-360° |
Core load | Tensile and compression | Anti-slip | Anti-twist |
Structure feature | Two semi-circular coupler + fasten bolts, or with wedge. | Cross-shape connect + bolts, anti-slip effect by inner surface convex ribs | Rotable lid-type structure, suitable for diagonal connections |
Application scenarios | Ledge extend, standard rise up | Ledge and standard connection | Diagonal brace and standard connection |
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