Compression Springs Inch, O.D. and Length Selectable

These round-wire compression springs are used in injection mold tooling wherever a compact component must apply controlled, axis-load compression during repeated cycles. Because the force acts along the spring axis, they are well suited for mechanisms that require stable load transfer rather than lateral compliance.

• Fixture and tryout tooling: In bench-top or build-stage jigs, the selectable outer diameter (0.078–1 in) and length (0.21–12 in) help match constrained spaces while maintaining predictable compression stroke for part positioning or retention.
• Core/cavity support and locating features: Choose an end configuration (Plain, Squared, or Sq. & Gr.) to improve seating against flat or guided surfaces, reducing wobble and improving repeatability under cycling.
• Actuation assists in auxiliary mold hardware: For assemblies that require consistent closing or latch bias, the selectable geometry supports integration into varied layouts while keeping the loading direction aligned to the design intent.

The provided datasheet for this series specifies the round-wire compression geometry (outer diameter 0.078–1 in and length 0.21–12 in) and end type options, but it does not list the steel grade, hardness (HRC), heat-treatment state, or coating. Therefore, heat treatment and hardness trade-offs (e.g., quench & tempered vs. nitrided) cannot be stated from the supplied information.

To ensure performance in mold environments, engineering selection should confirm the supplier’s spring material grade and target properties (wear resistance, fatigue life, and toughness). If multiple material/heat-treatment options are offered for this series, compare them by fatigue strength at operating stress and corrosion resistance for the intended duty cycle.

Select the spring by matching the available space in your mold assembly and the required installed stroke. This series supports outer diameter D from 0.078 to 1 in and free/overall length L from 0.21 to 12 in, allowing sizing across small inserts to larger auxiliary hardware.

• Outer diameter (D): Verify clearance to guide blocks, surrounding pockets, and any surrounding steel features. Use the closest D that still maintains necessary side clearance through the full compression travel.
• Length (L): Choose L to satisfy the installed height. Confirm that the spring can compress the required distance without bottoming before reaching the design load condition.
• End type: Match seating surfaces to the available options: Plain for general contact, Squared for flat seating, or Sq. & Gr. when guided/retained seating geometry is needed.

Tolerance and fit are not provided in the input data; request the specific allowable tolerances and how they affect stack-up versus your mold’s cavity/core spacing and guide clearances.