JIS Standard Chrome Silicon Heavy Duty Die Spring 24% Deflection

This heavy-duty die spring is used inside injection-molding and forming tooling systems that require controlled cushioning (die height compliance) under load. In press and die cavities, it compensates for deflection so the process maintains consistent contact pressure during heavy cycles.

• Automotive stamping and forming dies: The 24% deflection tolerance helps stabilize rebound and die cushioning when forming steel components at high tonnage, reducing variation in part thickness.
• Industrial appliance and hardware forming: Chrome silicon spring construction supports reliable performance under repetitive loading, suitable for tools that see continuous start/stop production.
• High-cycle packaging or transfer tooling: JIS-based consistency supports predictable setup and repeatable die cushioning, improving long-term operational stability.

The Chrome silicon design paired with the specified 24% allowable deflection makes this variant well suited for heavy-load die applications where stable rebound behavior and dependable cushioning are critical.

This coil die spring is built with a chrome silicon steel design, selected for its balance of strength, elasticity, and fatigue resistance in high-cycle press tooling. Chrome silicon typically improves wear resistance and spring durability versus plain carbon spring steels, supporting stable deflection performance under repeated loading.

For heat treatment, die springs of this type are commonly quenched and tempered to achieve the required spring hardness while maintaining toughness to resist cracking. The resulting trade-off is higher strength and fatigue life, with tempered toughness tuned to control rebound behavior rather than maximizing hardness alone.

• Performance emphasis: fatigue resistance and controlled deflection at heavy loads.
• Trade-off: increased strength from alloying and tempering can reduce toughness if hardness is driven too high.

Note: hardness level (HRC) and exact heat-treatment parameters are not provided in the input data, so they should be confirmed from the product’s technical certificate.

To select the correct spring, match three physical parameters to your die cushioning space: outer diameter (D), inner diameter (d), and length (L). Available ranges are D = 10–60 mm, d = 5–30 mm, and L = 20–300 mm.

• Step 1 – Fit envelope: Verify D clears the surrounding guide bore and that d provides the required clearance over the central post/rod.
• Step 2 – Free height / installed stroke: Use L to match the expected installed height and the working stroke of the die cushion mechanism.
• Step 3 – Deflection matching: Because this variant is specified for 24% allowable deflection, ensure your target load conditions keep operation within that deflection window to maintain stable rebound behavior.

Check tolerances on D/d/L as part of your press design. While specific tolerance values are not listed in the input data, engineers should confirm spring and housing tolerances to avoid binding or excessive clearance.