Dayton Lamina 9-3216-21 Die Spring 2in Medium-duty Blue

Product Description

The DAYTON LAMINA 9-3216-21 is a medium-duty die spring designed for use in stamping dies, molds, and tooling fixtures where consistent, repeatable force and deflection are required. Built from chromium-vanadium steel, it features a D-shaped wire cross-section that allows a higher load capacity within a compact envelope compared to round-wire springs. The spring has a 2-inch hole diameter, a 1-inch rod diameter, and a 4-inch free length. Maximum deflection load is 1,048 pounds at 1.51 inches of travel. The blue color coding indicates medium-duty classification per ISO 10243 standards. Toolmakers, die setters, and press room technicians are the primary installers.

This die spring is suited for progressive dies, stamping presses, injection molds, and similar tooling applications in both automotive and general manufacturing environments. It is commonly used where controlled spring return force is needed on punch holders, stripper plates, and core pulls. The 37.50 percent maximum operating deflection rating and 1.63-inch travel-to-solid load spec make it appropriate for moderate-cycle tooling where spring fatigue resistance is a priority.

Key Features

• Chromium-vanadium steel construction for fatigue resistance in cyclic tooling applications
• D-shaped wire profile delivers higher load capacity per unit volume compared to round-wire alternatives
• Maximum deflection load of 1,048 pounds at 1.51 inches of travel
• 4-inch free length with 2-inch hole diameter and 1-inch rod diameter for straightforward tooling integration
• Blue color coding indicates medium-duty classification per ISO 10243
• Compliant with ISO 10243, ISO 9001:2015, and NAAMS standards

Compatibility

Designed as an ISO 10243-compliant medium-duty die spring suitable for stamping dies, molds, and tooling fixtures requiring a 2-inch hole diameter and 1-inch rod diameter interface.

Installation Notes

Die springs are installed by toolmakers or die setters with the press or mold fully de-energized and locked out per OSHA lockout/tagout procedures. The spring should be seated squarely on the rod and within the pocket bore to prevent side loading, which accelerates fatigue failure. Do not compress beyond the rated maximum operating deflection of 37.50 percent during normal cycling. Inspect springs periodically for cracking, set, or corrosion, and replace as a matched set when possible to maintain consistent stripper or ejector force.