Description
Product Overview
The SUS301 constant force spring is engineered to deliver a precise and reliable pulling force of 1.96 pounds throughout its entire range of motion. Constructed from high‑grade spring steel, each spring features a 0.44 inch inner diameter and a 0.6 inch outer diameter, providing a compact footprint that integrates seamlessly into tight mechanical assemblies. The total length of 20.98 inches and an extended length of 17.99 inches give designers flexibility in configuring tension for a variety of applications, from valve actuators to cable management systems. Packaged in a set of five, the springs are ready for immediate deployment, reducing lead times and inventory costs for manufacturers and maintenance teams.
![[Product front view showing all components]](https://www.hotlistco.store/wp-content/uploads/2026/07/6083a7c131124d18b4950c9bfa59fb09.jpg)
Usage
These constant force springs excel in environments where a steady, predictable force is essential. They are commonly employed in industrial automation equipment, such as conveyor belt tensioners, robotic arm counterbalances, and precision positioning devices. Their consistent pull makes them ideal for medical device mechanisms, aerospace component restraints, and consumer electronics where space is limited but performance cannot be compromised. The springs also perform well in outdoor settings, resisting corrosion and maintaining performance across a wide temperature range, making them suitable for agricultural machinery and outdoor lighting fixtures.
Why Choose Us
Choosing the SUS301 constant force spring means selecting a product backed by Shanghai Lijun’s decades of expertise in spring manufacturing. Each spring undergoes rigorous quality control testing to ensure uniform force output and dimensional accuracy, guaranteeing that every unit meets the exact specifications required by demanding applications. Our commitment to durability is reflected in the spring’s resistance to fatigue, providing long‑term reliability even under continuous cycling. Additionally, we offer responsive technical support and a straightforward return policy, ensuring that any integration challenges are addressed promptly by our knowledgeable engineering team.
Key Features
- Consistent 1.96 lb pull for reliable tension across the full travel range
- Compact 0.44″ ID and 0.6″ OD design fits tight mechanical spaces
- High‑grade spring steel construction offers excellent fatigue resistance
- Pack of five springs reduces inventory handling and simplifies bulk purchasing
- Dedicated customer support and technical assistance for seamless integration
FAQ
What material is the SUS301 spring made from?
The spring is fabricated from premium spring steel that has been heat‑treated to achieve optimal strength and durability, ensuring consistent performance over many cycles.
Can the spring be used in outdoor environments?
Yes, the SUS301 is designed to resist corrosion and maintain its force characteristics across a broad temperature range, making it suitable for outdoor and harsh industrial settings.
How do I determine the correct installation length?
Refer to the total length of 20.98 inches and the extended length of 17.99 inches; the spring can be installed anywhere within this range to achieve the desired tension, with the force remaining constant throughout.
Is a larger quantity pack available?
We offer bulk packaging options beyond the standard five‑pack. Contact our sales team for pricing and availability of larger quantities to suit high‑volume production needs.
What warranty does the spring come with?
The SUS301 constant force spring is covered by a one‑year limited warranty against material defects, providing peace of mind for critical applications.
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