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The ASSOCIATED SPRING RAYMOND 204-508 is a heavy-duty die spring designed for use in stamping dies, press tooling, and industrial mold assemblies. It features a trapezoidal wire cross-section that increases load-bearing surface area and resists set over repeated cycles. With a free length of 2 inches (51 mm) and a spring rate of 391.72 N/mm, this blue-series spring delivers high force output in a compact envelope. It is manufactured from chromium alloy steel and conforms to ISO 10243 standards, making it a direct fit for globally standardized die setups. Tool and die makers, press maintenance technicians, and industrial MRO buyers are the primary installers and specifiers of this part.
This die spring is suited for high-load stamping, forming, and injection mold applications where consistent spring performance and dimensional accuracy are required. The blue color coding follows the ISO 10243 load classification system, identifying this spring as a heavy-load series. It fits standard die sets requiring a 25 mm hole diameter and a 12.5 mm rod diameter. It is appropriate for both production tooling environments and maintenance replacement scenarios where an ISO-compliant spring of this envelope size is needed.
Designed as an ISO 10243-compliant replacement die spring for standard tooling applications requiring a 25 mm hole diameter, 12.5 mm rod diameter, and 2-inch free length in the heavy-load (blue) series.
Die springs are installed by tool and die makers or press maintenance technicians during die build or scheduled tooling maintenance. Always relieve press pressure and lock out the press ram before removing or installing springs. Inspect the mating pocket diameter and guide rod diameter against the spring specifications before installation to prevent binding or premature failure. Do not compress beyond the rated maximum deflection of 19 mm.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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