Heavy Duty Die Spring 28% Deflection Chrome Silicon

This heavy-duty die spring is used inside injection mold tooling and adjacent press systems where consistent spring force over stroke is critical. Its 28% deflection characteristic helps maintain predictable force response during repeated clamp/opening cycles and part ejection timing.

• Automotive and industrial stamping/injection support tooling: use this spring in die spring stations or spacer/return mechanisms to stabilize force when deflection occurs under high-cycle loads.
• High-load mold lifters and ejector return assist: the spring’s force consistency at a defined deflection improves repeatability in mechanisms that experience frequent actuation.
• General die and tooling cavities requiring durability: the chromium silicon alloy selection supports fatigue-resistant operation in environments with vibration and wear.

Choose this variant when you need reliable load behavior at a defined deflection level while also prioritizing long service life during demanding tooling duty.

Built from a chrome-silicon (chromium silicon) spring alloy, this die spring is selected for high elastic performance and improved fatigue durability in tooling applications. Chrome and silicon additions enhance hardenability and help retain strength under cyclic loading, improving wear resistance at the spring working surfaces.

• Heat treatment (typical for spring alloy): supplied as a hardened and tempered spring condition to balance high fatigue strength with controlled toughness for forming and installation.
• Hardness and trade-offs: spring steels are engineered for resilience rather than extreme brittleness; tempering increases toughness while slightly reducing peak hardness to reduce risk of cracking under repeated deflection.
• Material comparison: relative to lower-alloy spring materials, chromium silicon generally offers better fatigue endurance and stability for heavy-duty cycles, especially where consistent force is required.

Select the spring dimensions by matching its outer diameter D, inner diameter d, and free length L to the available space and the functional working geometry in the mold/tooling assembly. This series supports Outer Diameter D = 1 ~ 5 in, Length L = 1 ~ 12 in, and Inner diameter d = 1 ~ 11 in.

• OD check (D): ensure D provides clearance against surrounding pockets, guides, or die frame features while not contacting under deflection.
• ID check (d): verify the inner diameter clears pins, rods, or posts with sufficient functional clearance to prevent binding during motion.
• Length (L): choose L to achieve the required stroke and to realize the intended 28% deflection within the mechanism travel.

Tolerance and fit are typically governed by the die spring seat features and guide alignment; confirm assembly clearances around OD/ID and ensure the spring is not preloaded beyond design assumptions unless your design explicitly accounts for it.