Heat Resistant Round Wire Spring 40% Deflection (WMH Series)

This heat-resistant coil spring is used in injection mold accessory tooling where stable force and repeatable deflection are required despite elevated ambient or localized cavity temperatures (up to 200°C). Typical uses include automatic shut-off or load-control mechanisms for mold inserts, where the 40% deflection target helps maintain consistent contact pressure across cycles.

• High-heat actuator and linkage fixtures: The round-wire geometry supports smooth spring action under 200°C, helping maintain predictable load response when thermal expansion changes clearances.
• Industrial automation end-effectors for molds: Use this spring to standardize force delivery in equipment that repeatedly cycles, improving reliability of latching, return, or controlled positioning functions.
• Process equipment and high-temperature assemblies: The WMH configuration is suited for applications needing durability and stable elastic behavior under sustained heat.

Round-wire coil construction and the specified 40% deflection behavior make it a practical choice for engineers designing dependable load control without relying on metal fatigue-tolerant improvisations.

The provided metadata specifies heat resistance up to 200°C for the WMH series coil spring. While a specific steel grade, hardness (HRC), or heat treatment condition (e.g., quench & temper, nitriding) is not listed in the available data, the intended performance implies a spring steel formulation and thermal stability appropriate for elevated-temperature elastic loading.

• High-temperature elastic stability: Designed to preserve load behavior over service at 200°C, prioritizing temper stability for spring characteristics.
• Wear resistance vs. toughness trade-off: Coil springs typically balance fatigue strength and toughness; materials optimized for hot temper resistance may show different trade-offs in impact toughness depending on tempering practice.
• Manufacturing process (typical): WMH round-wire springs are generally produced by forming and heat-treating spring steel wire, followed by sizing to achieve the specified deflection/load performance.

If you need confirmation of exact steel grade and heat treatment state (including expected HRC), provide your target operating duty and permissible tolerance stack, and we can align the specification to your requirement.

Select the spring’s working size by matching the required deflection and load window to the available parameters for diameter (D = 4 ~ 18 mm) and length (L = 5 ~ 100 mm), while ensuring the deflection requirement aligns with the 40% deflection design target.

• Step 1: Determine required allowable deflection: Use allowable deflection = 2 ~ 40 mm to confirm the spring can accommodate the travel without exceeding the intended deflection envelope.
• Step 2: Match load requirement: Choose a spring constant option (2, 2.9, 4.9 N/mm) to target the needed load; available load range is 3.9 ~ 196.1 N.
• Step 3: Verify physical fit: Confirm the selected coil D and free L fit within the mold accessory envelope and clearance to adjacent components. Use the allowable deflection to ensure you do not bottom out or bind.

Tolerances are not provided in the metadata, so during mold design you should include clearance and assembly tolerance in your stack-up, especially when high-temperature operation (200°C) can affect dimensions.