Dayton Lamina 9-2028-21 Die Spring 7in Blue Medium-duty

Product Description

The DAYTON LAMINA 9-2028-21 is a medium-duty die spring designed for use in metal stamping dies, punch presses, and precision tooling applications. Built from chromium-vanadium steel, it delivers consistent, repeatable force throughout its cycle life. The spring features a 1-1/4 inch hole diameter, a 5/8 inch rod diameter, and a 7 inch free length, making it suitable for applications requiring controlled compression travel. Rated at a maximum deflection load of 436 pounds with a maximum deflection of 2.63 inches, it performs reliably under repetitive loading conditions common to production die work. The blue color coding identifies it as a medium-duty rating per ISO 10243 standards.

This die spring is used in industrial press tooling environments, including metal stamping, forming, bending, and blanking dies. It is typically installed by tool and die makers, machine maintenance technicians, and precision tooling specialists in both production and job-shop settings. The D-shaped wire cross-section maximizes the number of active coils within a given space, improving load capacity relative to round-wire springs of the same envelope. Typical installations involve stripper plates, ejector systems, and pressure pads within progressive or compound die assemblies.

Key Features

• Chromium-vanadium steel construction for high fatigue resistance under repetitive loading
• Blue color code identifies medium-duty rating per ISO 10243
• D-shaped wire cross-section increases active coil count within the same outer diameter envelope
• 1-1/4 inch hole diameter and 5/8 inch rod diameter for precise guide pin fitment
• Maximum operating deflection of 37.50 percent of free length
• Travel to solid load of 2.95 inches provides a defined solid stop reference

Compatibility

Designed as an ISO 10243 medium-duty die spring for use in standard die spring pockets with a 1-1/4 inch bore and 5/8 inch guide rod across metal stamping, forming, and press tooling applications.

Installation Notes

Die springs are installed by qualified tool and die makers or maintenance technicians during die build or rebuild procedures. Always relieve all press and die pressure before disassembling any die component. Inspect the mating guide rod and spring pocket for wear, scoring, or out-of-tolerance dimensions before installing a new spring. Do not exceed the maximum operating deflection rating, as running the spring to solid will accelerate fatigue failure.