Chrome Silicon Inch Extra Heavy Duty Die Spring - 20% Deflection

This extra heavy duty die spring is used inside injection and stamping-style tooling where a die set must reliably return after each cycle. In automotive and industrial forming applications, the spring’s 20% allowable deflection helps stabilize return force under high-cycle wear, reducing the risk of incomplete part ejection or die misalignment.

For large mold inserts and die blocks subject to heavy loads, the chrome silicon steel construction supports durable die return while maintaining consistent force response as the assembly compresses repeatedly. In high-density production tooling (frequent shot-to-shot movement), the inch-standard sizing makes it easier to match conventional coil-spring die spring layouts without extensive redesign.

• 20% deflection suitability: supports stable return behavior under load variation
• Inch compatibility: aligns with inch tooling and die spring standard practices

The spring is made from chrome silicon steel, selected for its combination of high strength and fatigue resistance in heavily loaded die return systems. Chrome and silicon additions improve hardenability and elastic properties, helping the spring sustain cyclic compression with reduced relaxation.

Typical die-spring heat treatment for this material class is quench and temper to reach the required spring hardness while balancing toughness. You trade maximum hardness (for wear and stiffness) against toughness (for resistance to cracking under repeated load).

• Wear resistance: enhanced by spring-grade alloying and heat treatment for long service life
• Toughness vs. hardness: tuned by tempering to avoid brittleness under high-cycle forming
• State: quenched & tempered spring steel (consistent spring performance under compression)

If alternative spring steels are considered, chrome silicon variants generally prioritize fatigue endurance for loaded die-return duty compared with lower-alloy or lower-hardening grades.

Select the die spring dimensions to match the compression path and space limits in your mold or tooling stack. Use Outer Diameter D (in) in the available range of 1 ~ 5 in, and choose Length L (in) from 1 ~ 12 in based on the free length available between die components.

• Free length vs. compressed condition: verify the required working compression does not exceed the provided max. comp. length (in) range of 0.67 ~ 8.52 in.
• Rod diameter check: confirm Rod Diameter (in) = 1 ~ 11 in (as specified for the spring’s intended assembly geometry) so the spring seats correctly and avoids binding.
• Force stability: this variant is designed around 20% allowable deflection, so ensure your operating deflection aligns with that target.

Tolerance and fit are typically governed by your die spring pockets and guide clearances; if your stack height varies, re-calculate against the max. comp. length to prevent over-compression and loss of return force stability.