Associated Spring Raymond 104-528 Die Spring Red Medium Heavy-duty

Product Description

The ASSOCIATED SPRING RAYMOND 104-528 is a medium heavy-duty die spring designed for use in stamping dies, punch presses, and industrial tooling applications. It features a 1-inch hole diameter, a 1/2-inch rod diameter, and a 7-inch free length. The spring is wound from chromium alloy steel with a trapezoidal wire profile, which maximizes load-bearing capacity within a compact coil cross-section. It carries a maximum deflection load of 259 pounds and a maximum deflection of 2.59 inches. The red color coding identifies it as a medium heavy-duty spring per standard die spring classification. Installation and replacement are performed by tool and die makers, maintenance machinists, and industrial equipment technicians.

This die spring is suited for use in metal stamping dies, injection molds, and mechanical presses where consistent, repeatable spring force is required. The 1-inch hole diameter accommodates standard die set guide posts, and the 1/2-inch rod diameter is compatible with common inner rod configurations used in tooling fixtures. It is applicable in both production and maintenance scenarios where medium heavy-duty cycling loads are present.

Key Features

• 1-inch hole diameter and 1/2-inch rod diameter for standard die post and rod fitment
• 7-inch free length provides extended working travel in deep die sets
• 259-pound maximum deflection load with 2.59 inches of maximum deflection
• Spring rate of 109 pounds per inch for predictable, linear force output
• Trapezoidal wire cross-section increases load capacity versus round wire of equal size
• Chromium alloy steel construction for durability under high-cycle tooling conditions
• Red color coding identifies medium heavy-duty duty rating per industry standard classification

Compatibility

Designed as a standard medium heavy-duty die spring for use in stamping dies, punch press tooling, and industrial fixtures that accept a 1-inch hole diameter and 1/2-inch rod diameter spring with a 7-inch free length.

Installation Notes

Die springs should be installed by qualified tooling or maintenance personnel with the press or machinery fully de-energized and locked out per applicable LOTO procedures. Ensure the guide post and inner rod are clean and within the specified diameter tolerances before installation. Do not compress the spring beyond its rated maximum deflection, as over-compression will reduce service life and can cause premature fatigue failure. Inspect the spring seating surfaces for burrs or damage before assembly.