Constant Force Spring
A constant force spring is a flat strip of stainless or carbon steel tightly wound into a coil. When pulled, this constant tension spring delivers nearly uniform tension from start to finish, unlike ordinary coil springs, which get stiffer as they stretch. This steady force makes constant force spring applications ideal for tools and systems that require smooth, controlled motion or balanced lifting.
Teng Yao’s constant springs cover a broad range of designs. Models vary by end attachment – such as T-tab, round-hole, or double-hole mounts – to suit different installation styles. Other options include crimp or bent-over ends for guided or electrical applications, as well as keyhole designs for quick-release assembly. Specialized versions are also available, including perforated types for high-speed or long-stroke movement and non-magnetic options for use in precision electronic or medical equipment.
Compact, durable, and customizable in force and size, our springs with constant force are used in adjustable desks, printer carriages, sliding panels, and automation systems to ensure smooth, consistent performance over long service life.
Constant Force Spring CFS-001
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-002
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-003
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-004
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-005
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-006
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-007
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Constant Force Spring CFS-008
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.
Non-Magnetic Constant Force Springs CFS-101
Materials：Including SUS301 and precision steel strips, with customization available to suit your application.
Thickness：0.04 - 1.0mm
Width：2.5 - 90mm
Features：Constant force、Safety design、Wide range of applications
Applications：Suitable for products that operate in a linear motion. The force remains consistent during the extension process, and also remains consistent during the retraction process. Overall, the extension force is slightly greater than the retraction force, by approximately 10–20%.