Associated Spring Raymond 104-728 Die Spring 7in Red

Product Description

The ASSOCIATED SPRING RAYMOND 104-728 is a heavy-duty die spring engineered for use in press tooling, stamping dies, and industrial machinery applications. Built from chromium alloy steel with a trapezoidal wire cross-section, this spring delivers a spring rate of 255 pounds per inch and a maximum deflection load of 683.8 pounds. The red color coding indicates load category per ISO and ANSI die spring standards. With a free length of 7 inches, a 1.5-inch hole diameter, and a 0.75-inch rod diameter, it is sized for medium-to-large die sets. Toolmakers, die setters, and industrial maintenance technicians are the primary installers of this component.

This die spring is suited for compression applications in metal stamping, injection mold tooling, and heavy industrial press equipment. The trapezoidal wire profile maximizes material cross-section within the coil, allowing higher load capacity relative to round-wire springs of the same envelope size. The red load-class designation identifies it as a heavy-load spring, appropriate for high-cycle stamping operations and applications requiring consistent return force over extended service life. A maximum deflection of 2.59 inches provides substantial working travel for demanding tooling configurations.

Key Features

• Chromium alloy steel construction for high fatigue resistance in repetitive-cycle applications
• Trapezoidal wire cross-section provides higher load density compared to round-wire die springs
• Red color coding indicates heavy load class per standard die spring classification
• Spring rate of 255 pounds per inch for predictable, linear compression behavior
• Maximum deflection load of 683.8 pounds with 2.59 inches of working travel
• Manufactured under ISO 9001:2008 and ISO/TS 16949:2009 certified quality systems

Compatibility

Designed as an OEM-style replacement die spring for compression applications requiring a 1.5-inch hole diameter, 0.75-inch rod diameter, 7-inch free length, and heavy-load red classification in standard press tooling and stamping die assemblies.

Installation Notes

Die springs are installed by toolmakers or industrial maintenance technicians and should be seated squarely on a flat surface or guided on a rod within the specified diameter range. Always de-energize and lock out the press before servicing die components. Never compress this spring beyond its rated maximum deflection of 2.59 inches, as exceeding the deflection limit accelerates fatigue failure. Inspect the spring for set, cracking, or corrosion at each die maintenance interval.