Super-High Deflection Coil Spring - 60% Deflection

This super-high deflection coil spring is used inside injection mold accessory assemblies where consistent spring travel is needed for ejection, stripper return, or movable tool elements. Because it is engineered for 60% deflection loads, it helps maintain a predictable load level through the majority of the stroke, reducing force drift over repeated cycles.

In automotive connector and housing molds, the stable force-deflection curve supports reliable part release even when temperature fluctuations shift friction and resistance at the moving components. The flat wire construction is suited for smoother force behavior during controlled deflection travel.

For higher-temperature production lines (up to 200°C rated performance), it can be used where nearby tool steel temperatures and cycle conditions are elevated. Engineers select this variant when they need dependable load characteristics at significant allowable deflection rather than only minimal spring travel.

• Use for ejection/return or movable insert stroke where repeatable load at 60% deflection is critical
• Select flat-wire geometry to stabilize the force curve
• Choose the 200°C-capable option for hot-runner/mold-area applications

The provided metadata specifies heat resistance to 200°C and flat wire geometry, but it does not list the exact steel grade, surface treatment, or heat-treatment recipe. Therefore, material-specific statements such as exact HRC values, nitriding, or quenched-and-tempered conditions cannot be stated from the available data.

From an engineering standpoint, the key trade-off for this class of high-deflection coil springs is balancing high spring travel with sufficient wear and fatigue resistance. Flat wire construction is typically selected to improve stability of the force-deflection curve, which reduces variability during cycling.

• Heat resistance: rated to 200°C
• Geometry: flat wire for stable force behavior
• Not specified in data: steel grade, target hardness (HRC), coating/thickness, or heat treatment state

If you share the drawing/spec sheet for SWU series at your target size, we can help map the correct metallurgy and recommended operating deflection to your cycle requirements.

Use the spring’s available ranges to match your required stroke and force level. Start by selecting the spring that meets your target allowable deflection window (available 9 ~ 180 mm) while operating at the intended 60% deflection condition for the SWU concept.

Next, match the physical envelope. Choose D (diameter) = 10.5 ~ 43 mm and L (free length) = 15 ~ 300 mm so the spring fits within the mold accessory space without binding during compression.

If your design needs internal clearance, confirm the inner diameter d (flat wire type only): 6 ~ 31 mm. Then verify force requirements using the provided ranges: spring constant = 1.09 ~ 19.61 N/mm and load = 68.6 ~ 588.4 N.

• Step 1: determine required working deflection and ensure it lies within 9–180 mm
• Step 2: match L to your stack-up and allowable installed height
• Step 3: confirm D and d clearances for guide rods and housings

Paint peeling option is configurable: select Yes or No based on your assembly process compatibility.