Dayton Lamina 9-0612-21 Die Spring 3/8 in Blue Medium-duty

Product Description

The DAYTON LAMINA 9-0612-21 is a medium-duty die spring designed for use in stamping dies, punch presses, and similar tooling applications. It features a 3/8-inch hole diameter and a 3/16-inch rod diameter, giving it a secure fit over standard guide rods and within standard die pockets. The free length is 3 inches, with a maximum deflection of 1.12 inches and a maximum deflection load of 36 pounds. Constructed from chromium-vanadium steel, the spring delivers consistent force and fatigue resistance under repetitive cycling. The blue color coding identifies this as a medium-duty unit per ISO 10243 standard classification.

This spring is suited for light-to-medium force applications in progressive dies, blanking dies, and forming tooling across automotive, metal fabrication, and general manufacturing environments. It is typically installed by tool and die makers or maintenance machinists during die build or repair. The D-shaped wire cross-section provides increased load capacity relative to round wire springs of the same envelope size, making it a practical choice where space in the die set is limited.

Key Features

• Chromium-vanadium steel construction for high fatigue life under cyclic loading
• ISO 10243 color-coded blue for medium-duty identification
• D-shaped wire cross-section increases load capacity within a compact envelope
• 3/8-inch hole diameter fits standard die guide rods and pockets
• Maximum operating deflection of 37.50 percent of free length
• Meets ISO 9001:2015 and NAAMS standards

Compatibility

Designed as a standard ISO 10243 medium-duty die spring for use in stamping and forming tooling where a 3/8-inch hole diameter and 3/16-inch rod diameter are specified.

Installation Notes

Die springs should be installed by qualified tool and die makers or maintenance personnel familiar with press tooling. Always relieve all stored energy and ensure the press is locked out before servicing or replacing die springs. Do not compress beyond the rated maximum operating deflection, as overcompression accelerates fatigue and can cause premature failure. Inspect seating surfaces in the die pocket and on the rod for burrs or damage before installation.