Dayton Lamina 9-1004-21 Die Spring Blue Medium-duty

Product Description

The DAYTON LAMINA 9-1004-21 is a medium-duty die spring engineered for use in stamping dies, presses, and tooling fixtures where consistent, repeatable force is required. Built from chromium-vanadium steel, this spring features a D-shaped wire cross-section that maximizes load capacity relative to its compact envelope. It carries a maximum deflection load of 117.00 pounds at a maximum deflection of 0.3700 inches, making it well-suited for applications that demand reliable spring-back force without excessive travel. Toolmakers, die setters, and press technicians work with this component as a direct functional element inside production tooling.

This die spring is designed for installation in stamping and forming dies, fixture clamps, and industrial press tooling where a 0.625-inch hole diameter and 0.34375-inch rod diameter are the governing constraints. The 1-inch free length keeps the spring compact for tight die clearances. The blue color coding indicates medium-duty classification per ISO 10243, allowing quick visual identification during die maintenance and changeovers. It is commonly used in automotive, metal fabrication, and general manufacturing tooling environments.

Key Features

• Chromium-vanadium steel construction for high fatigue life under cyclic loading
• D-shaped wire cross-section maximizes load density within the hole diameter
• Medium-duty rating with 117.00 pounds maximum deflection load
• Maximum operating deflection of 37.50 percent of free length
• Travel to solid of 0.4400 inches provides a defined compression limit
• Blue color coding per ISO 10243 for instant duty-class identification on the shop floor

Compatibility

Designed as an OEM-style replacement or direct-fit die spring for stamping dies and press tooling requiring a 0.625-inch hole diameter, 0.34375-inch rod diameter, and 1-inch free length in the medium-duty blue classification per ISO 10243.

Installation Notes

Die springs are installed and serviced by toolmakers and press maintenance technicians. Always de-energize and lock out the press before accessing the die set. Confirm that the hole diameter, rod diameter, and free length match the die design before installation. Do not compress this spring beyond its rated maximum deflection, as exceeding the travel-to-solid dimension under load can cause permanent set or spring failure.