Dayton Lamina 9-1218-26 Heavy-duty Die Spring Red

Product Description

The DAYTON LAMINA 9-1218-26 is a heavy-duty die spring designed for use in stamping dies, molds, and press tooling where consistent, high-force compression is required. Built from chromium-vanadium steel with a D-shaped wire profile, it delivers a maximum deflection load of 319 pounds across a maximum deflection of 1.35 inches. The 0.75-inch hole diameter accommodates a 0.375-inch rod, and the spring ships at a free length of 4.5 inches. Color-coded red to indicate heavy-duty duty rating, this spring meets ISO 10243 dimensional standards and is manufactured under an ISO 9001:2015 registered quality system. Die makers, tooling technicians, and machine builders are the primary installers.

This spring is suited for industrial stamping, progressive die, and injection mold tooling applications where repeatable force and long cycle life are priorities. The heavy-duty red classification places it in the upper force range of the standard ISO 10243 die spring color spectrum. A maximum operating deflection of 30 percent of free length is the recommended working limit for sustained production cycles. The NAAMS compliance makes it a straightforward fit for automotive stamping and Tier 1 supplier tooling environments where standardized components are required.

Key Features

• Heavy-duty duty rating with 319-pound maximum deflection load
• Chromium-vanadium steel construction for high fatigue resistance under cyclic loading
• D-shaped wire profile for consistent seating in standard die spring pockets
• 0.75-inch hole diameter and 0.375-inch rod diameter for standard tooling fitment
• Travel to solid load of 1.49 inches with a recommended operating deflection of 30 percent
• Meets ISO 10243, ISO 9001:2015, and NAAMS standards

Compatibility

Designed as a direct-fit replacement for ISO 10243 heavy-duty (red) die springs with a 0.75-inch hole diameter, 0.375-inch rod diameter, and 4.5-inch free length in standard stamping die and mold tooling assemblies.

Installation Notes

Installation is performed by tooling technicians and die makers during press setup or die maintenance. Always verify that the spring pocket depth and rod clearance match the compressed length before closing the die. Inspect mating bores for wear or burrs that could cause uneven loading across the spring coils. Never exceed the rated maximum operating deflection of 30 percent in continuous production use, as operating beyond this limit accelerates fatigue failure.