About Us

power spring tester design

Teng Yao Hardware Industry Co., Ltd., established in 1973, has been dedicated to the professional development, design, and manufacturing of various flat-type springs, including steel strip spiral springs, constant force springs, power springs, pre-stressed power springs, carbon brush springs, and spring clips, among others. Our manufacturing philosophy is rooted in our commitment to high-quality service and focused development.


Our development goal is to provide tailor-made solutions for each customer and bring spring products to the global market. Teng Yao Hardware customizes spring products to meet the needs of clients worldwide, marketing custom-made products globally while maintaining a relentless pursuit of quality and service excellence. We are committed to delivering outstanding product performance, enhancing user satisfaction, and meeting customer needs with optimal solutions.


Teng Yao Hardware has passed the ISO 9001:2000 and ISO 9001:2008 quality system certifications to ensure the highest product quality.


Our production material specifications range from 0.04 mm to 1.2 mm in thickness and 2.5 mm to 80 mm in width. All of Teng Yao’s steel strip spring series can be customized to suit your needs—we assist in design and development, helping you overcome challenges by providing effective solutions and creating high-quality, tailor-made springs.


We will continue to uphold superior product performance and enhance our service quality, sharing our professional technology with the world. If you are interested in Teng Yao Hardware’s custom spring products, we welcome you to become our partner. We will serve you promptly and professionally.



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1. Constant Force Spring
2. Power Spring
3. Prestressed Power Spring
4. Motor Brush / Twin Spring
5. Variable Force Spring
6. Constant Torque Spring
7. Flat Spring

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1. Multi-function & fully automated CNC spring machine 
2. Self-acting compression spring machine 
3. Fully automated extension spring machine 
4. Force tester for steel strip spring
5. Torque tester for steel strip spring 
6. Cycle life tester for steel strip spring 
7. Hardness tester
8. Slitting machine for steel strip
9. Edge Trimming machine for steel strip
10. Temper furnace for spring parts