Medium Heavy Duty Die Spring 35% Deflection Chrome Silicon Inch

Die springs like this are used inside mechanical and hydraulic die sets to maintain controlled springback and stable clamp/load behavior during forming operations. Their consistent 35% allowable deflection makes them suitable for die shoe return systems and precision ejector/stripper actuation where repeatability across cycles matters.

• Automotive and general metal-forming dies: In progressive or transfer die stations, the spring’s chromium-silicon alloy chemistry helps sustain spring performance under repeated load/unload cycles, reducing drift in working height.
• Stamping press tooling: When the die design requires a predictable force-deflection curve, the medium heavy-duty configuration supports reliable load carrying while staying within the specified deflection capability.
• North American die component builds: Inch sizing (OD 1–5 in, length 1–12 in, ID d 1–11 in) allows straightforward selection to match standard die shop component interfaces.

This die spring is made from a chromium-silicon alloy, selected for its ability to retain mechanical properties after service exposure and repeated flexing. Chromium silicon steels are commonly chosen for high springback performance because they offer a strong balance of wear resistance at contact surfaces and toughness needed for cyclic loading.

• Heat treatment (spring practice): Typically supplied in a quenched and tempered spring condition to achieve stable elastic behavior and dimensional reliability.
• Hardness trade-offs: Higher temper resistance supports load retention, while maintaining enough toughness helps prevent brittle failure under shock or misalignment.
• Compared materials: Relative to basic carbon spring steels, chromium-silicon versions generally improve resilience under cycling; compared with fully stainless spring grades, they often prioritize load stability and fatigue performance for die shop environments.

To select the correct spring for a die tooling assembly, match the spring’s outer diameter (OD D), inner diameter (d), and free length (L) to the available space and the required working deflection. This series covers D = 1–5 in, L = 1–12 in, and d = 1–11 in.

• Check cavity/guide clearance: Use d to ensure clearance over the guide rod or center post, and use D to avoid interference with surrounding die components.
• Set working height and stroke: Choose L so that the spring can operate within the 35% allowable deflection under working loads; undersizing stroke capacity can cause force spike and premature fatigue.
• Tolerance & fit: Because springs are precision components, verify that your design accounts for typical assembly clearances around guides and seats; if your die design uses tight compression seats, confirm the allowable space is consistent with the selected D and L.