Associated Spring Raymond 204-728 Die Spring 7 in Medium Duty

Product Description

The ASSOCIATED SPRING RAYMOND 204-728 is a medium-duty die spring engineered for use in stamping dies, press tooling, and other industrial compression applications. Built from chromium alloy steel with a trapezoidal wire cross-section, it delivers higher load capacity per unit length than round-wire springs of comparable size. The spring measures 7 inches (178 mm) in free length and accommodates a maximum deflection of 2.63 inches (67 mm). It carries a maximum deflection load of 664.24 pounds (2954.70 N). The blue color coding identifies the medium-duty load category per ISO 10243 standards, making quick identification straightforward on the shop floor.

This die spring is suited for installation in punch and die sets, injection mold tooling, and general press applications where consistent spring force and long fatigue life are required. The 1.575-inch (40 mm) hole diameter and 0.787-inch (20 mm) rod diameter allow it to seat on a guide rod or inside a counterbore. It is appropriate for both production tooling environments and maintenance replacement scenarios in tool and die shops and industrial manufacturing facilities.

Key Features

• Trapezoidal wire cross-section increases load capacity and fatigue life compared to round-wire die springs
• Blue color coding per ISO 10243 for fast medium-duty classification identification
• 7 inch (178 mm) free length with 2.63 inch (67 mm) maximum deflection travel
• Maximum deflection load of 664.24 pounds (2954.70 N)
• Chromium alloy steel construction for durability under repeated cycling
• Fits 1.575 inch (40 mm) hole diameter over 0.787 inch (20 mm) guide rod

Compatibility

Designed as an OEM-style replacement or new-installation die spring for medium-duty stamping dies, press tooling, and injection mold assemblies requiring a 40 mm hole diameter, 20 mm rod diameter, and 178 mm free length per ISO 10243 specifications.

Installation Notes

Die springs of this type are installed by tool and die makers or maintenance machinists working on press tooling. Always relieve all press pressure and lock out the press before removing or installing springs in a die set. Inspect the guide rod and counterbore for wear or damage before seating the spring, as misalignment accelerates fatigue failure. Do not compress the spring beyond its rated maximum deflection of 2.63 inches (67 mm).