ShangHai Lijun Constant Force Spring Mechanical 40lb Compact 5x3x2.7in

Description

Product Overview

The ShangHai Lijun constant force spring is engineered to provide a consistent 40 lb pull force throughout its travel. Made from high‑grade steel, the spring offers excellent fatigue resistance and corrosion protection. Its compact dimensions (5 × 3 × 2.7 in) and lightweight (12.48 oz) make it easy to integrate into space‑constrained applications. The spring is manufactured by ShangHai Lijun Spring Co., Ltd, a reputable supplier known for precision spring products.

Usage

Designed for industrial and scientific settings, this spring excels in door‑closing mechanisms, counterbalance assemblies, cable retractors, and hose reels. It is suitable for manufacturers, maintenance engineers, and DIY hobbyists who need a reliable constant force solution. The spring performs well in indoor environments and can tolerate moderate temperature variations typical of workshop conditions.

Why Choose Us

ShangHai Lijun combines decades of spring‑making expertise with strict quality controls, ensuring each spring meets exact force specifications. Our products undergo rigorous testing for load consistency and durability, giving you confidence in long‑term performance. We also provide responsive technical support and a straightforward return policy for added peace of mind.

Key Features

• Provides a steady 40 lb pull force for reliable operation
• High‑grade steel construction resists wear and corrosion
• Compact size fits into tight mechanical assemblies
• Lightweight design simplifies installation and handling
• Dedicated customer support and easy replacement options

FAQ

What is the maximum travel distance of the spring?

The spring is designed for a travel range of up to 2 inches while maintaining a constant force.

Can the spring be used outdoors?

Yes, the steel coating provides good corrosion resistance, but for harsh marine environments a stainless‑steel variant is recommended.

Is the spring compatible with standard door‑closer brackets?

It fits most standard brackets; however, we advise checking the mounting dimensions to ensure a proper fit.

What is the warranty period?

We offer a one‑year limited warranty covering material and workmanship defects.

How do I order a replacement if the spring fails?

Contact our support team with the original order number, and we will arrange a quick replacement shipment.