In the high-tech realms of telecommunications and precision electronics, every single component is critical. Our line of Communication Electronics Springs is engineered to meet the stringent demands of this industry for high precision, unwavering reliability, and superior performance. From smartphones and networking equipment to critical medical electronic devices, our springs play a core role in ensuring signal integrity, power stability, and the long-term operational reliability of your products.

ZW Precision Hardware employs state-of-the-art manufacturing processes and the highest quality conductive and high-strength materials. Every spring we produce undergoes meticulous design calculations and rigorous testing. Whether it’s an antenna spring for signal transmission, an EMI shielding spring to prevent electromagnetic interference, or a battery spring to ensure continuous power, we are dedicated to providing optimized solutions that support the superior performance and market competitiveness of your products.

Our Core Competencies

Our Typical Products Specifications

Spring Type	Precision Compression Springs, Conical Springs, Contact Springs, Custom Wire Forms
Technical Parameters	Wire Diameter: 0.1mm – 1.5mm Outer/Inner Diameter: Customized to fit the client’s antenna module structure Free Length: 2.0mm – 20.0mm Force/Pressure: Precisely controlled at specific working points, with tolerances as tight as ±10% Contact Resistance: < 20 mΩ
Material Characteristics	Beryllium Copper (BeCu): The premier choice for high-performance applications, offering an exceptional combination of conductivity, high strength, and excellent fatigue and corrosion resistance. Phosphor Bronze: Provides a good balance of conductivity and elasticity, offering a cost-effective solution. Stainless Steel (SUS304/316): Offers excellent corrosion resistance and strength, typically requiring plating to enhance conductivity.
Surface Treatment	Gold Plating: Provides the best conductivity and superior resistance to corrosion and oxidation. Silver Plating: Offers excellent conductivity at a lower cost than gold. Tin Plating: Ensures good conductivity and solderability.
Heat Treatment	Stress Relieving: Eliminates internal stresses from the forming process to stabilize spring dimensions and mechanical properties. Age Hardening (for BeCu, etc.): Significantly increases the material’s strength and elasticity after forming.

Spring Type	Leaf Springs / Fingerstock: Provides multi-point contact, suitable for panels, doors, and other planar connections. Canted Coil Springs: Deliver near-constant force axially or radially, ideal for shielding round or irregularly shaped gaps. Custom Stampings: Shielding solutions designed for specific cavity structures.
Technical Parameters	Material Thickness/Wire Diameter: 0.05mm – 0.5mm Compressed/Working Height: Precisely designed based on gap size and required force. Grounding Resistance: Extremely low, typically in the milliohm (mΩ) range. Shielding Effectiveness: Achieves a specific decibel (dB) value within a designated frequency range (e.g., 10MHz – 10GHz).
Material Characteristics	Beryllium Copper (BeCu): The optimal choice, combining high conductivity, high elasticity, and outstanding mechanical strength with excellent fatigue resistance. Stainless Steel (SUS301): For applications requiring high elasticity where shielding is a secondary concern. Phosphor Bronze: A good all-around performer, offering a balance between cost and performance.
Surface Treatment	Tin Plating: Enhances conductivity and corrosion resistance, and provides a good base for soldering. Nickel Plating: Offers excellent wear and corrosion protection. No Plating Required (for BeCu): The inherent high conductivity of the copper alloy is sufficient for many shielding applications. Conductive Adhesive Tape: Can be used as a supplementary mounting method in certain applications.
Heat Treatment	Stress Relieving: Ensures the spring maintains its shape and elastic force after long-term compression. Age Hardening (for BeCu): Optimizes the spring’s mechanical properties, ensuring a reliable contact force over its lifespan.

Spring Type	Micro Compression Springs: Commonly used inside pogo pins. Contact Clips / Stampings: Used in SIM card trays, SD card sockets, FPC connectors, etc. Torsion Springs: Employed in the locking or ejection mechanisms of connectors.
Technical Parameters	Wire Diameter/Material Thickness: As low as 0.03mm. Dimensional Tolerance: High precision, can be controlled to ±0.02mm. Cycle Life: Designed to meet requirements from thousands to millions of mating cycles. Current Rating: Designed based on application needs, from milliamps (mA) to several amps (A). Contact Force: Maintained stably within a specified travel to ensure low contact resistance.
Material Characteristics	Music Wire: High strength and low cost, but requires plating for corrosion protection and conductivity. Often used inside probe pins. Stainless Steel (SUS304/316): Excellent corrosion resistance and mechanical properties, a common material for pogo pin springs. Beryllium Copper (BeCu): Used for contact stampings that need to carry higher currents or require superior conductivity.
Surface Treatment	Gold Plating: The standard finish, providing the lowest contact resistance and the best durability and corrosion resistance. Selective Gold Plating: Gold is applied only to critical contact areas to reduce cost. Palladium-Nickel (PdNi) with Gold Flash: Offers higher wear resistance for high-mating-cycle applications.
Heat Treatment	Precision Stress Relieving: Performed in a controlled atmosphere to prevent surface oxidation and ensure dimensional stability. Vacuum Heat Treatment: Used for high-performance materials to prevent any surface contamination and maximize mechanical properties.

Spring Type	Conical or Cylindrical Compression Springs: The most common type, accommodates tolerance variations in battery length, ypically used for the negative terminal. Leaf Springs / Stampings: Often used for positive terminal contact or in space-constrained designs, such as coin cell holders.
Technical Parameters	Wire Diameter/Material Thickness: 0.2mm – 2.0mm Supported Battery Types: AA, AAA, C, D, 9V, 18650, Coin Cells, etc. Mounting Style: Surface Mount (SMT), Through-Hole, Snap-in Contact Resistance: Kept as low as possible to minimize power loss.
Material Characteristics	Carbon Steel / Music Wire: Lowest cost and good strength, but must be plated to prevent rust and ensure conductivity. Stainless Steel (SUS304/301): Naturally corrosion-resistant without plating, but has average conductivity. Ideal for applications where cost and corrosion resistance are priorities. Phosphor Bronze: Good conductivity and elasticity, with better corrosion resistance than carbon steel. Beryllium Copper (BeCu): The highest-performance option. Its conductivity is close to that of pure copper, combined with high strength and fatigue resistance, making it ideal for high-performance or high-reliability devices.
Surface Treatment	Nickel Plating: The most common finish. It provides good corrosion and wear resistance at a high cost-effectiveness. It also matches the nickel casing of batteries, preventing galvanic corrosion. Silver Plating: Higher conductivity than nickel, but at a higher cost. It is prone to tarnishing (which does not affect conductivity). Tin Plating: Provides good solderability and conductivity.
Heat Treatment	Stress Relieving: Ensures the spring does not take a permanent set under the constant pressure of the battery, maintaining a consistent contact force.

Spring Type	Precision Stampings: Such as contact blades in sockets or switch contact arms. Wire Forms: Used for contact clips and brush springs in high-current applications. Coil Springs: Provide the opening and closing force for contacts in relays and circuit breakers.
Technical Parameters	Wire Diameter: 0.1mm – 2.5mm Current/Voltage Rating: A core parameter that determines the material and cross-sectional area. Contact Pressure: Designed to break through any surface oxide films and establish a stable, low-resistance connection. Temperature Rise: Must remain within safe limits when carrying the rated current. Mechanical Life: Switches and relays may require cycle lives ranging from tens of thousands to millions of operations.
Material Characteristics	Beryllium Copper (BeCu): The perfect combination of high conductivity and high strength, making it the premier material for high-performance electrical contacts. Phosphor Bronze: Offers excellent elasticity and moderate conductivity, widely used in low-to-medium current applications. Brass: Good conductivity but weaker elasticity, suitable for static connections or components with low spring-back requirements. High Carbon Steel: High strength but poor conductivity, typically used for mechanical support components of a spring assembly rather than the direct current-carrying part.
Surface Treatment	Silver Plating: The standard choice for high-current applications due to its excellent conductivity. Gold Plating: Used for low-level signal or high-reliability applications to prevent fretting corrosion. Tin Plating: An economical choice for general-purpose electrical connections. Composite Plating: Such as silver or gold over a nickel underplate, combining the hardness of the base layer with the conductivity of the top layer.
Heat Treatment	Age Hardening / Precipitation Hardening: Used for high-performance alloys like Beryllium Copper to achieve maximum strength and hardness after forming. Stress Relieving: Eliminates processing stress to stabilize the spring’s geometry and mechanical properties.

Spring Type	Micro Compression Springs: Used in mechanical keyboard switches and detector switches. Metal Domes: Used in membrane switches and tactile switches to provide a crisp “click” and haptic feedback. Torsion Springs: Used in rotary or toggle switches. Leaf Springs: Used in micro switches to achieve a snap-action (rapid make/break) motion.
Technical Parameters	Wire Diameter/Material Thickness: 0.05mm – 2mm Actuation Force: The force required to press the switch, measured in gram-force (gf) or Newtons (N). Actuation Travel: The distance from the resting position to the point of actuation. Total Travel: The maximum distance the switch can be depressed. Force-Travel Curve: A graph describing the relationship between force and travel, which defines whether a switch feels linear, tactile, or clicky. Lifespan: Ranges from tens of thousands to over 100 million cycles.
Material Characteristics	Stainless Steel (SUS301/304): The most common material, providing excellent fatigue life and corrosion resistance, key to a switch’s long-term reliability. Music Wire: High strength and low cost, suitable for internal applications where corrosion resistance is less of a concern. Phosphor Bronze / Beryllium Copper: Used when the switch spring must also carry an electrical current, providing conductivity.
Surface Treatment	Passivation: A process for stainless steel that enhances its natural corrosion resistance. Nickel/Gold Plating: Used when the spring itself also functions as an electrical contact to reduce contact resistance. Oiling: Light oiling to ensure smooth movement and prevent corrosion.
Heat Treatment	Stress Relieving: Critically important for stabilizing the spring force, ensuring it remains consistent after millions of operations. Austempering: A treatment for high-carbon steel that provides excellent toughness and fatigue life.

Our Solution Process

We provide an end-to-end solution to ensure your project progresses efficiently and successfully.