JIS Standard Chrome Silicon Medium Duty Die Spring - 50% Deflection

This medium-duty die spring is used inside injection mold tooling to deliver stable return force and vibration damping in components that see intermittent mechanical shock. Because it is specified for 50% deflection, it helps engineers maintain a predictable spring response while maintaining die alignment and consistent clamp/transfer behavior.

• Automotive connector and terminal molds: Use in ejector or die-latch interfaces where medium loads and frequent cycling benefit from oil-tempered spring wire to absorb shock and reduce micro-deflection.
• Industrial brackets/housing molds: Suitable for backing support or parting-line devices that require repeatable force over a working deflection range rather than maximum-load-only performance.
• General production die tooling: The chrome silicon formulation supports reliable medium-load support when vibration and load cycling are expected.

Choose the coated variant when the mold environment is more aggressive; use the no-coating option to match your surface preparation and compatibility requirements.

JIS-based chrome silicon die spring construction uses oil-tempered wire designed for elastic recovery under medium load. The oil-tempering process promotes a balanced combination of wear/abrasion resistance and toughness, supporting shock absorption during high-cycle mold operation.

• Material behavior: Chrome silicon steels improve hardenability and elastic performance, helping maintain load stability at a defined working deflection.
• Heat-treatment state: The spring wire is oil-tempered rather than simply normalized; this is intended to retain toughness while achieving usable hardness for repeated cycling.
• Hardness & trade-offs: Higher hardness increases wear resistance but can reduce toughness; oil-tempering is selected to avoid excessive brittleness for medium-load tooling.

Coating options (coated vs no coating) address surface durability for different mold environments, without changing the core steel’s tempering intent.

Select the die spring by matching the required working load at 50% deflection and the available physical space in the mold. Start by determining the target maximum load from your design envelope, using the provided range of 59 ~ 3920 N.

• Outer diameter (D): Choose from 6 ~ 70 mm to fit the spring seat and guide clearances.
• Length (L): Select 10 ~ 500 mm so the spring does not bottom out at full working stroke and still maintains sufficient free length for assembly.

For compatibility, confirm that your cavity/core or supporting hardware provides the correct seat geometry for the selected D, and verify that the installed length accommodates your stack-up tolerances. If you are selecting between coated and no coating, account for any coating thickness in close-fit areas, and ensure your spec documentation matches your intended deflection and load curve.