Dayton Lamina 9-3248-21 Die Spring 12 Inch Blue Medium-duty

Product Description

The DAYTON LAMINA 9-3248-21 is a medium-duty die spring engineered for use in stamping dies, punch presses, and precision tooling applications. Built from chromium-vanadium steel, this spring delivers consistent, reliable force across repeated compression cycles. It features a 2-inch hole diameter, a 1-inch rod diameter, and a 12-inch free length, making it suitable for larger die setups that require controlled deflection under load. The maximum deflection load is 968 pounds, with a maximum deflection of 4.5 inches. The blue color coding identifies the medium-duty load category per ISO standards. Toolmakers and die maintenance technicians are the primary installers of this component.

This die spring is designed for industrial tooling environments including metal stamping, forming, and progressive die assemblies. It is used wherever consistent spring-back force is needed to strip material from punches or maintain component positioning during press cycles. The blue medium-duty rating places it in a well-defined load range within ISO 10243 color-coded die spring classification, making it straightforward to source and cross-reference within standard tooling designs.

Key Features

• Chromium-vanadium steel construction for fatigue resistance across high-cycle tooling use
• 2-inch hole diameter and 1-inch rod diameter for standard die post fitment
• 12-inch free length with 4.5-inch maximum deflection and 968-pound maximum deflection load
• D-shaped wire cross-section for increased load capacity relative to round-wire springs of the same envelope
• Blue color coding per ISO 10243 medium-duty classification
• Maximum operating deflection of 37.50 percent of free length

Compatibility

Designed as an OEM-style replacement or direct fitment die spring conforming to ISO 10243 International Standard and NAAMS (North American Automotive Metric Standard) specifications for medium-duty blue die springs with a 2-inch hole diameter and 1-inch rod diameter.

Installation Notes

Die springs of this type are installed by toolmakers and die maintenance technicians during die build or scheduled tooling maintenance. Always relieve all press pressure and ensure the ram is fully supported before removing or installing die springs. Inspect the spring pocket and rod for wear, misalignment, or burrs that could cause uneven loading. Do not compress this spring beyond the rated maximum deflection to avoid permanent set and premature fatigue failure.