Heavy Duty Load Compression Spring Die Springs Green-Heavy O.D:8-22mm Multi-Size

Match the O.D. to your die spring pocket bore and the free length to your required working stroke plus pre-load length. For Green-Heavy class, the spring is typically deflected to 15–30% of free length under pre-load and up to 30–45% at full working load. Always verify the spring rate and maximum deflection for your specific size variant against your tooling design requirements.

Die springs are color-coded by load class per ISO 10243 and DIN 2093 standards. Green indicates the Heavy load class, which provides a higher spring force per unit of deflection compared to lighter classes (Yellow = Light, Blue = Medium, Red = Extra Heavy). Choose Green-Heavy when your application requires significant clamping or stripping force in a compact spring pocket.

Yes. These springs are manufactured to conform to ISO 10243 / DIN 2093 dimensional standards, making them compatible with standard die spring pockets designed for those specifications. Always confirm the O.D., I.D., and free length match your pocket dimensions and guide pin diameter before installation.

Die springs manufactured to ISO 10243 / DIN 2093 standards are typically rated for approximately 500,000 to 1,000,000 cycles at recommended deflection levels (up to 30–45% of free length for Heavy class). Exceeding the maximum recommended deflection significantly reduces fatigue life. For high-cycle production tooling, inspect springs periodically and replace when free length loss exceeds 3–5% of original length.

These springs feature a protective surface coating that provides basic resistance to oxidation and light moisture exposure typical of workshop environments. For applications involving prolonged exposure to cutting fluids, coolants, or aggressive chemicals, consider additional protective measures such as periodic lubrication or selecting stainless steel die springs if available for your size requirement.

The 1-piece option is ideal for prototyping, testing, or replacing a single worn spring in an existing tool. The 5-piece pack offers better value per spring and is recommended when building new tooling with multiple spring positions, or when you want to keep spares on hand for maintenance. Most stamping and injection mold dies use multiple springs, so the 5-piece pack is the more practical choice for production tooling.

Die springs use a rectangular (flat) wire cross-section rather than the round wire used in standard coil springs. This allows more wire material to be packed into the same O.D. envelope, resulting in higher load capacity, greater energy storage, and improved fatigue resistance. Die springs are specifically engineered for the cyclic, high-load conditions found in metal stamping, forging, and injection molding tooling.