Dayton Lamina 9-3218-36 Die Spring Extra Heavy-duty Yellow

Product Description

The DAYTON LAMINA 9-3218-36 is an extra heavy-duty die spring engineered for precision tooling and metal stamping applications. Built from chromium-vanadium steel with a D-shaped wire profile, it delivers consistent force and deflection characteristics across high-cycle press operations. The spring features a 2-inch hole diameter, a 1-inch rod diameter, and a free length of 4.5 inches. Maximum deflection load reaches 2255 pounds at 1.12 inches of travel, with a travel-to-solid load of 1.31 inches. Color-coded yellow for quick identification as an extra heavy-duty rating, this spring meets ISO 10243 international standards and is manufactured under ISO 9001:2015 registered quality systems.

This die spring is suited for use in progressive dies, compound dies, and other precision metal-forming tooling where consistent spring-back force is critical. It fits standard die sets requiring a 2-inch bore and a 1-inch guide rod. The extra heavy-duty duty rating makes it appropriate for high-load stamping and forming operations found in automotive tooling and industrial press shops. It also complies with NAAMS specifications, making it compatible with North American automotive metric standard tooling layouts.

Key Features

• Extra heavy-duty duty rating with a maximum deflection load of 2255 pounds
• Chromium-vanadium steel construction for high fatigue resistance in cyclic loading
• D-shaped wire profile for increased load capacity relative to round-wire designs
• Maximum operating deflection of 25 percent of free length
• Yellow color coding for fast identification of duty rating in mixed tooling environments
• Meets ISO 10243, ISO 9001:2015, and NAAMS standards

Compatibility

Designed for use in standard die sets with a 2-inch bore diameter and a 1-inch guide rod, conforming to ISO 10243 and NAAMS tooling specifications.

Installation Notes

Die springs are installed by tool and die makers or press technicians during die assembly or maintenance. Always de-energize and lock out the press before accessing the die set. Ensure the guide rod and bore are free of burrs or debris before seating the spring. Do not compress the spring beyond its rated travel-to-solid load, as over-compression accelerates fatigue failure.