JIS Standard Chrome Silicon Medium Duty Die Spring 60% Deflection

This medium-duty die spring is used in industrial injection mold tooling where the die or ejector return force must be consistent over many cycles. Its 60% deflection rating makes it suitable for moderate working loads—supporting stable springback during forming, blanking, and fine-geometry part ejection sequences.

• Automotive and appliance components: In hot/cold press and transfer mold stations with medium forming loads, the controlled deflection behavior helps maintain return repeatability even when cycle-to-cycle load varies.
• Electronics housings and covers: When springs are used to recover cams, stripper plates, or die inserts after part release, the spring’s oil-tempered chrome silicon wire supports dependable force return for fine feature replication.
• General-purpose die inserts: The spring’s JIS compatibility fits standard die spring layouts, reducing re-engineering time when upgrading or maintaining existing tooling.

For shops that manage corrosion risk, the coated or no-coating options allow selection based on mold environment and maintenance intervals.

This die spring uses chrome silicon spring wire with oil-tempered processing, providing a strong balance of stiffness, resilience, and fatigue resistance. Oil tempering improves the uniformity of the wire’s microstructure and helps stabilize the load/deflection response under repeated cycling.

• Performance focus: Chrome silicon construction delivers high wear and fatigue resistance for medium-load die service.
• Heat-treatment state: Oil-tempered spring condition is intended to produce consistent springback and controlled deflection.
• Hardness and trade-offs: Compared with harder, highly stressed spring steels, oil-tempered chrome silicon typically prioritizes toughness to reduce risk of cracking under dynamic loading, while still maintaining good wear resistance for die return applications.

Coating selection (coated vs. no-coating) is used to manage corrosion rather than changing the base heat-treated spring properties.

Select dimensions by matching the required spring working range in your die spring pocket and the load/deflection target of the mechanism. This spring is specified for an allowable deflection ratio of 55 or 60%, with maximum load varying by size from 30 to 471 N.

• Choose OD (D): Match the spring’s outer diameter within the available range of 6 to 30 mm to your die seat diameter, ensuring clearance for assembly and alignment.
• Choose free length (L): Verify the available 15 to 200 mm length supports your stroke without coil bind at maximum deflection.
• Deflection-to-load check: Use the 60% deflection variant to target medium-load return behavior; confirm the expected operating load remains below the corresponding maximum load for the selected size.
• Coating fit: If coating is used, account for any minor dimensional change at the seat clearance and corrosion-prevention needs.

These dimensions are typically fixed per SKU; select the closest OD and L, then validate clearance and stroke against your core/cavity or die carrier constraints.