high-cost-performance fifth-wheel（5th wheel）couplings for sale

At Kales, we pride ourselves on delivering high-cost-performance fifth-wheel couplings that provide a robust and reliable connection between semi-trailers and towing vehicles such as trucks or tractor units. Our coupling system consists of a kingpin—a vertical steel pin with a diameter of either 2 inches (50.8 mm) or 3½ inches (88.9 mm), protruding from the bottom front of the semi-trailer—and a horseshoe-shaped coupling device known as a fifth wheel, mounted on the rear of the towing vehicle. When connected, the downward-facing surface of the semi-trailer, centered around the kingpin, rotates against the fixed upward-facing surface of the fifth wheel, which remains stationary. To reduce friction, grease is applied to the surface of the fifth wheel.In regions like Australia and New Zealand, this configuration is sometimes referred to as a turntable, especially when it features a rotating ball-race-bearing design, which further enhances maneuverability. The primary advantage of this type of coupling is its stability during towing.

Common Models of Kales Fifth-Wheel Coupling

Kales offers two main models tailored to different transport needs:

Model 50 Saddle (2″): Suitable for standard load transportation where road conditions are optimal and the weight being towed is relatively light.
Model 90 Saddle (3.5″): Designed for more demanding applications, providing enhanced stability and suitable for most transport scenarios.
The numbers 50 and 90 refer to the working diameters of the saddle pins, measuring 50.8mm and 88.9mm respectively, ensuring compatibility with a wide range of trailers and towing requirements.

Product Advantages of Kales Fifth-Wheel Coupling

National Standard Quality

Our production, processing, and quality inspection strictly adhere to GB/T 31879-2015, the general technical standards for road vehicle drawbar seats, ensuring products meet stringent national standards.

Enhanced Stability

Kales fifth-wheel couplings improve vehicle compactness, enhancing control, stability, and tracking ability. The design ensures smooth turning without pushing the trailer’s head, providing superior directional accuracy.

Increased Strength

Constructed from premium materials, our couplings offer exceptional load-bearing capacity and large support areas. They can reliably handle the dynamic forces exerted during start-up, acceleration, deceleration, steering, and braking.

Diverse Specifications

Available in fixed, lift, and slide models, our fifth-wheel couplings cater to various operational conditions. Choose the right specification based on your vehicle’s specific needs for optimized performance.

Choose Kales for fifth-wheel couplings that not only meet but exceed industry standards, offering you peace of mind and unmatched reliability in every transport journey. Let us be your partner in achieving safer and more efficient logistics solutions.

Product Paramenters of Kales Fifth-Wheel Coupling