American Type Stamping's CH series suspension (typically available alongside Hutchens CH 7700 and CH 9700 specifications) is a high-performance, heavy-duty leaf spring mechanical suspension system designed for heavy-duty commercial trailer applications in North America.

Key Components and Specifications:

Cast Steel Suspension Mounts: The CH series designation emphasizes its use of heavy-duty cast steel suspension mounts—including the front, center, and rear mounts—which offer greater strength, thicker wear points, and higher load-bearing capacity compared to standard welded or stamped parts.

Balancer Assembly: The cast steel balancer, located between axle spans, balances the dynamic force distribution between axles, reducing frame stress and ensuring even tire wear.

Torque Arms and Alignment: Equipped with rigid and adjustable torque arms, the annular end of the adjustable torque arm prevents axle rotation during heavy braking and maintains precise alignment.

Leaf springs and fasteners: High-strength multi-leaf heavy-duty leaf springs are used, securely connected by robust U-bolt kits and bottom axle mounts.

Axle layout: Supports single-axle, dual-axle, and triple-axle configurations, including both top-mounted and bottom-mounted installation methods, suitable for flatbed trailers, dump trailers, and heavy-duty transport trailers.