Constant Force Spring ShangHai Lijun Mechanical Compact Durable 5x3x27

Description

Product Overview

The ShangHai Lijun constant force spring is engineered to provide a reliable, unvarying force throughout its travel range, making it ideal for applications that demand consistent tension. Crafted from high‑grade spring steel, the coil is heat‑treated to achieve superior fatigue resistance, ensuring long‑term performance even under repetitive loading cycles. Its compact dimensions—measuring just 5 x 3 x 2.7 inches—and lightweight construction (approximately 1.5 pounds) allow for easy integration into confined spaces without sacrificing strength.

Designed for the mechanical constant force spring market, this product combines precision engineering with practical versatility. The spring’s constant force characteristic eliminates the need for complex adjustment mechanisms, simplifying installation and reducing maintenance requirements. Whether used in door closers, cable retractors, or hose reels, the spring delivers a smooth, predictable force that enhances the overall reliability of the system.

Key specifications include a package size of 5 x 3 x 2.7 inches, a weight of 1.5 pounds, and a manufacturing origin from ShangHai Lijun spring co., ltd, a reputable supplier known for stringent quality control. The product holds an ASIN of B0DMM8YSMM and ranks #29 in the Mechanical Constant Force Springs category, reflecting its strong market acceptance.

Beyond its core mechanical attributes, the spring features a corrosion‑resistant coating that protects against environmental exposure, extending its service life in harsh industrial settings. The design also incorporates a low‑profile end configuration, facilitating seamless attachment to a variety of mounting hardware without interfering with adjacent components.

Overall, the ShangHai Lijun constant force spring offers a blend of durability, precision, and ease of use that meets the demanding requirements of modern industrial applications. Its consistent performance, combined with a compact footprint, makes it a valuable component for engineers seeking reliable force solutions.

Usage

This spring excels in environments where a steady pulling or pushing force is essential. In commercial door closers, it counterbalances door weight, ensuring smooth operation and preventing slamming. Its constant force output also benefits cable retractors used in office equipment, where it maintains tension on cords and prevents tangling.

Industrial machinery that incorporates hose reels or conveyor belts can leverage the spring’s reliable force to manage cable or belt tension, reducing wear and extending component lifespan. The spring’s compact size allows it to be installed in tight enclosures, making it suitable for retrofitting older equipment without extensive redesign.

For outdoor applications, the corrosion‑resistant coating safeguards the spring against moisture and chemicals, making it appropriate for agricultural machinery, marine equipment, and outdoor signage systems. Its lightweight nature simplifies handling during installation, while the consistent force profile minimizes the need for frequent adjustments.

Engineers and maintenance technicians appreciate the spring’s straightforward integration: it can be mounted using standard brackets or custom fixtures, and its performance remains stable across a wide temperature range, from cold storage facilities to heated manufacturing floors.

Why Choose Us

ShangHai Lijun spring co., ltd has a long history of producing high‑quality spring components, backed by rigorous testing protocols and ISO‑9001 certification. Each constant force spring undergoes dimensional inspection and load testing to verify that it meets exacting performance standards before leaving the factory.

Our commitment to material excellence means we source premium steel alloys and apply precise heat‑treatment processes, resulting in springs that resist fatigue and maintain their force characteristics over thousands of cycles. This reliability translates into lower total cost of ownership for our customers, as the springs rarely require replacement.

We also provide responsive technical support, offering guidance on selection, installation, and troubleshooting. Our engineering team can assist with custom specifications if your application demands unique dimensions or force ratings, ensuring a perfect fit for any project.

In addition, we stand behind our products with a comprehensive warranty, giving you confidence that your investment is protected. Our global distribution network ensures timely delivery, so you can keep your production schedules on track.

Key Features

• Provides a steady, unchanging force throughout its travel, eliminating the need for complex adjustment mechanisms.
• Made from high‑grade, heat‑treated spring steel for exceptional durability and fatigue resistance.
• Compact 5 × 3 × 2.7 inch size and lightweight design simplify installation in confined spaces.
• Corrosion‑resistant coating protects against moisture and chemicals, extending service life in harsh environments.
• Backed by responsive technical support and a comprehensive warranty for peace of mind.

FAQ

What is the maximum load this constant force spring can handle?

The spring is designed to deliver a consistent force up to its rated capacity, which is specified in the product data sheet. For most standard applications such as door closers and cable retractors, the spring provides sufficient force to balance typical loads. If you require a higher load rating, our engineering team can recommend a suitable model or custom solution.

Can the spring be used in outdoor or marine environments?

Yes. The spring features a corrosion‑resistant coating that protects against moisture, salt spray, and other aggressive agents commonly encountered in outdoor or marine settings. This coating helps maintain the spring’s performance and extends its lifespan, making it a reliable choice for harsh environmental conditions.

How do I install the spring in a door closer system?

Installation is straightforward. Attach one end of the spring to the door’s pivot point using the provided mounting bracket, and connect the opposite end to the door closer housing. Adjust the spring’s position to achieve the desired closing speed and force. Detailed installation diagrams are included in the product manual, and our support team is available to assist if needed.

Is custom sizing or force rating available?

Absolutely. ShangHai Lijun offers custom engineering services to tailor the spring’s dimensions, force output, and end configurations to match specific application requirements. Contact our technical support department with your specifications, and we will work with you to develop a solution that fits your exact needs.

What warranty does the spring come with?

The product is covered by a one‑year limited warranty that guarantees freedom from material and workmanship defects. Should any issue arise within the warranty period, we will repair or replace the spring at no additional cost, subject to the terms and conditions outlined in the warranty documentation.