Gibraltar DCIM40-89 Die Spring 3-1/2 in Medium-duty Blue

Product Description

The GIBRALTAR DCIM40-89 is a medium-duty die spring designed for use in stamping dies, punch presses, and precision tooling applications. Manufactured from chromium alloy steel with a trapezoidal wire cross-section, this spring delivers a maximum deflection load of 725 pounds and a spring rate of 509 pounds per inch. It is colored blue for quick visual identification of duty rating in multi-spring setups. Installation and replacement are typically performed by toolmakers, die setters, and maintenance machinists working in metal fabrication and stamping environments.

This spring fits applications requiring a 1.5 inch hole diameter and a 0.75 inch rod diameter. With a free length of 3.5 inches and a maximum deflection of 1.43 inches, it is suited for progressive dies, compound dies, and stripper plate assemblies where consistent, repeatable spring force is critical. The blue color coding follows industry convention for medium-duty classification, making it straightforward to identify and replace in multi-spring die sets.

Key Features

• Trapezoidal wire cross-section for higher load capacity compared to round wire springs of the same envelope size
• Maximum deflection load of 725 pounds with a spring rate of 509 pounds per inch
• Free length of 3.5 inches and maximum deflection of 1.43 inches
• Chromium alloy steel construction for durability under cyclic loading
• Blue color coding identifies medium-duty rating at a glance in die sets
• Meets NAAMS, ISO 10243, and ISO 9001:2015 standards

Compatibility

Designed as an OEM-style replacement die spring for tooling and stamping die assemblies requiring a 1.5 inch hole diameter and a 0.75 inch rod diameter with a 3.5 inch free length and medium-duty load rating.

Installation Notes

Die spring replacement is performed by qualified toolmakers or die maintenance personnel with the press locked out and all stored energy released before service. Verify hole diameter, rod diameter, free length, and duty rating match the existing spring specification before installing. Do not compress beyond the rated maximum deflection of 1.43 inches, as exceeding travel-to-solid limits accelerates fatigue failure. Inspect the mating rod and pocket bore for wear or damage before installing a new spring.