Low Deflection Coil Spring - 30% Deflection, SWN Series

This low-deflection coil spring variant is used inside plastic injection mold auxiliary mechanisms where repeatable force under stroke is critical. A common scenario is in precision actuator assemblies for connector and latch tooling, where stable return force helps maintain consistent pin, slide, or lifter timing across cycles.

Another practical application is wear-tolerant control systems in hot or warm production cells. With heat resistance up to 200°C and a design focused on controlled deflection (30% deflection basis), it helps limit performance drift when tooling temperature rises.

• Flat wire option supports compact packaging and controlled spring behavior in limited envelope spaces.
• Industrial mechanisms benefit from the stable spring characteristics produced by the low-deflection design and predictable load/deflection profile.
• With/without paint peeling availability supports compatibility with different finishing and cleanliness requirements.

The provided metadata does not specify a steel grade, heat-treatment route (e.g., quenched & tempered, nitrided), or exact hardness (HRC) for this SWN low-deflection coil spring. Therefore, those parameters cannot be stated reliably from the current dataset.

What can be supported is the performance target: low deflection with stable force and heat resistance up to 200°C. In spring engineering terms, achieving this stability typically involves selecting an appropriate spring steel and applying heat treatment to balance wear resistance (surface durability) and toughness (resistance to cracking under cyclic loading).

• Flat wire construction is intended to improve spring behavior in compact assemblies by promoting more predictable deflection response.
• If your application requires specific hardness/HRC or surface treatment, confirm the steel/heat-treatment specification from the supplier’s technical sheet.
• Paint-peeling options (Yes/No) indicate different surface/finish conditions that may affect corrosion resistance and appearance in sensitive mechanisms.

Select the spring by matching its outer diameter D, length L, and required deflection capacity to the molded mechanism stroke and packaging constraints. Available D values are 14.5, 17, 21, 26, 31, 37 mm, and L is 20 to 300 mm.

If using the flat wire type, also confirm the inner diameter d (flat type only): 8.5, 10.5, 13.5, 16.5, 21, 26 mm. This ensures proper alignment around shafts, guide rods, or core/cavity-related hardware.

• Verify that the required working stroke stays within the allowable deflection range of 6 to 90 mm.
• Use the stated spring constant (6.1 to 76.27 N/mm) to estimate load at your target deflection; published load values (e.g., 274.6, 372.7, 490.3, 686.5, 833.6, 882.6 N) can be used directly for quick selection.
• Tight-fit requirements should consider that selection is by nominal dimensions; for critical fits, validate assembly clearances with your specific guide/retainer geometry.
• Choose with/without paint peeling to match your surface-condition requirements for the mold system.