Associated Spring Raymond 204-640 Die Spring 10in Blue

Product Description

The ASSOCIATED SPRING RAYMOND 204-640 is a heavy-duty die spring engineered for use in stamping dies, press tooling, and precision industrial fixtures. Built from chromium alloy steel with a trapezoidal wire cross-section, this spring delivers consistent force and controlled deflection under high-cycle press conditions. It has a free length of 10 inches (254 mm), a rod diameter of 16 mm, and a hole diameter of 32 mm. The blue color designation indicates its load class within the ISO 10243 standard series. Toolmakers, die setters, and industrial maintenance technicians are the primary installers of this component.

This die spring is suited for use in metal stamping dies, injection mold assemblies, and other precision tooling applications where repeatable spring force is critical. The trapezoidal wire profile increases the volume of steel per coil compared to round wire, which allows for higher load capacity within the same envelope. With a maximum deflection of 95 mm and a spring rate of 122.20 N/mm, this spring is appropriate for moderate-to-heavy load tooling applications in both production and job-shop environments.

Key Features

• Trapezoidal wire cross-section for increased load capacity within a compact coil envelope
• Chromium alloy steel construction for durability under high-cycle fatigue conditions
• 10 inch (254 mm) free length with 95 mm maximum deflection travel
• Blue load-class color coding per ISO 10243 standard for easy identification
• Spring rate of 122.20 N/mm for predictable, consistent force output
• Manufactured under ISO 9001:2008 and ISO/TS 16949:2009 certified quality systems

Compatibility

Designed as an ISO 10243-compliant die spring for use in standard 32 mm hole diameter die sets and tooling fixtures requiring a 16 mm guide rod and 10 inch free length.

Installation Notes

Die springs are installed by qualified toolmakers or die setters during die build or maintenance. Always relieve all press and tooling pressure before removing or replacing die springs. Ensure the guide rod and pocket bore are clean and within tolerance before installation to prevent side loading, which can shorten spring life. Do not compress the spring beyond its rated maximum deflection of 95 mm.