About Us

Founded in 1973, Teng Yao Hardware Industry Co., Ltd has grown into a trusted spring manufacturer specializing in the development, design, and manufacturing of flat strip springs. With more than five decades of experience, we have built our reputation as a leading custom spring manufacturer with high-quality service, technical expertise, and reliable production. Our products are widely used in industrial, automotive, consumer, and commercial applications that demand stable force output and long-term durability.

Our Products

Teng Yao manufactures a full range of strip-based flat spiral springs, offering both standard and fully customized solutions.

  • Constant Force Springs

    As an experienced constant force spring manufacturer, we produce constant force springs that provide smooth, steady pulling force for retractors, lighting mechanisms, POP displays, and adjustable systems.

  • Constant Torque Springs

    These springs provide uniform rotational force, commonly used in cable reels, counterbalance devices, and return mechanisms.

  • Power Springs

    These springs provide uniform rotational force, commonly used in cable reels, counterbalance devices, and return mechanisms.

  • Prestressed Power Springs

    These springs store torque efficiently and are widely used in clocks, timers, hose reels, and seat-belt retractors.

  • Motor Brush Springs (Single & Twin Coil)

    These springs deliver high energy density in compact spaces, making them suitable for fall arresters and heavy-duty retractors.

  • Variable Force Springs

    These springs offer increasing or decreasing tension along the stroke for retail pushers, feeders, and controlled-movement systems.

  • Custom Flat Springs & Spring Clips

    These springs offer increasing or decreasing tension along the stroke for retail pushers, feeders, and controlled-movement systems.

Commitment to Quality

Our spring factory is certified under ISO 9001:2008 and ISO 9001: 2015, ensuring strict quality consistency throughout production.

We work with steel strip materials ranging from 0.04mm to 1.2mm in thickness and 2.5mm to 80mm in width, giving customers flexibility in force requirements, space constraints, and performance targets.

Every steel strip spring can be fully customized. We support clients from early engineering design and prototyping to mass production, helping them optimize mechanisms and solve technical challenges.

Manufacturing Capabilities

Our in-house equipment ensures stable quality and reliable performance:

  • Multi-function CNC spring forming machine
  • Automatic compression and extension spring machines
  • Force and torque testing machines for steel strip springs
  • Cycle life and hardness testers
  • Steel strip slitting and edge-trimming machines
  • Tempering furnace for controlled heat treatment

These capabilities allow us to maintain full control over precision, fatigue resistance, material integrity, and long-term reliability.