Product Specification

Precision Long Leg Torsion Spring | High Torque for Auto Interior

Product Description

The Precision Long Leg Torsion Spring is a high-performance mechanical component specifically designed for applications requiring a significant lever arm and reliable return force. Unlike standard torsion springs with short legs, the extended leg design (up to 28mm or custom lengths) allows for greater mechanical advantage and flexible mounting within complex assemblies. These springs are the go-to solution for providing smooth, consistent resistance and automatic reset functions in tight spaces.

Manufactured by the METS Team, our long leg torsion springs are crafted from high-grade carbon steel or stainless steel, ensuring a high strength-to-weight ratio. To enhance durability and aesthetics, these springs feature a professional Black Oxide finish, which provides essential corrosion resistance and a sleek look for visible consumer products. Whether it’s for the soft-touch release of a car door handle or the precise snap-back of a printer tray, our torsion springs are engineered to meet the most demanding cycle-life requirements.

Key Features

• Extended Lever Design: Long legs provide superior leverage and torque transmission, making them ideal for large-angle rotations.

• Precision Black Oxide Coating: Offers a non-reflective, anti-rust surface that is perfect for automotive interiors and high-end electronics.

• High Torque Stability: Maintains consistent force throughout millions of cycles, ensuring the "new car feel" of components lasts for years.

• Tight Coil Winding: Engineered with a high spring rate ($k$) to provide immediate responsiveness with zero lag.

• Burr-Free Ends: Precision-cut and finished ends prevent damage to plastic housings and ensure smooth installation.

Technical Parameters

Industrial Applications

Our long leg torsion springs are versatile "silent heroes" in various high-demand sectors:

• Automotive Interiors: The primary choice for door handles, glove box latches, sun visors, and center console armrests, providing that premium, tactile reset motion.

• Consumer Electronics: Essential for the spring-loaded mechanisms in camera flashes, laptop hinges, and foldable gaming controllers.

• Office Automation: Used in printer feed trays, scanner lids, and paper guide flaps to ensure accurate alignment and return.

• Smart Home Devices: Integrated into smart lock handles, motorized blinds, and kitchen appliance hinges.

• Medical Equipment: Used in diagnostic tool housings and adjustable stands for controlled movement.

Customization Services

The METS Team specializes in high-precision OEM manufacturing to fit your exact blueprints:

• Custom Leg Bending: We can perform secondary CNC bending on the legs (U-bends, V-bends, or offset hooks) for snap-in assembly.

• Material Selection: Choose oil-tempered steel for heavy-duty torque or 316 stainless steel for medical-grade hygiene.

• Variable Torque Settings: Our engineers can calculate the perfect wire diameter and coil count to match your target resistance force.

• Prototyping: We offer 3D-printed or small-batch CNC samples for rapid R&D validation before mass production.

Support and Services

• Design Optimization: We provide DFM (Design for Manufacturing) feedback to reduce your assembly costs and improve spring life.

• Fatigue Testing: In-house testing to verify the spring maintains its torque values after 100,000+ cycles.

• On-Time Delivery: Streamlined production processes to ensure your assembly line never stops.

Packing and Shipping

• Internal Packaging: Neatly arranged in anti-static or plastic trays to prevent leg tangling and surface scratches.

• External Packaging: Double-walled corrugated boxes for maximum protection during international transit.

• Shipping Methods: Global door-to-door delivery via Express (DHL/FedEx/UPS), Air, or Sea freight.

FAQ

Q: Why is Black Oxide preferred for automotive torsion springs?

A: Black oxide provides a durable, non-flaking black finish that protects against rust while maintaining the spring's dimensional tolerances. It is also aesthetically preferred for interior components.

Q: Can you customize the angle between the two legs?

A: Yes. We can set the initial free angle to any degree ($0^circ$ to $360^circ$) to provide the exact pre-load required for your mechanism.

Q: What is the maximum leg length you can produce?

A: With our advanced CNC spring formers, we can produce legs up to 150mm or longer, depending on the wire diameter and application.

Q: Is there a minimum order quantity (MOQ)?

A: Our standard MOQ for production runs is 1,000 units, but we are happy to support smaller quantities for initial testing and prototypes.