Core Features

Structural Design:

The main body is a large-diameter helical spring, with cast iron flange discs at both ends, used for connection with the door axis or roller.

The surface of the spring is electroplated, presenting a silver-gray metallic luster, with excellent anti-rust and corrosion resistance properties.

Functionality:

As the balance spring for the door body, it counteracts the weight of the door body through the pre-tightening torque, significantly reducing the load of the door opening mechanism and enhancing the smoothness of the door operation.

It is widely used in garage doors, industrial sliding doors, and other roller-type door body systems.

Specification:

“1 ¾ inches” refers to the wire diameter of the spring or the roller compatibility size, which is a key parameter for selection and must be precisely matched with the weight and size of the door body.

核心特性

结构设计：

主体为大直径螺旋弹簧，两端配有铸铁法兰盘，用于与门轴或卷轴连接。

弹簧表面经过电镀处理，呈现银灰色金属光泽，具备优异的防锈、耐腐蚀性能。

功能作用：

作为门体的平衡弹簧，通过预紧扭矩抵消门体自重，大幅降低开门机负载，提升门体运行平稳性。

广泛用于车库门、工业滑升门等卷轴式门体系统。

规格说明：

“1 ¾ 寸” 指弹簧的线径或卷轴适配尺寸，是选型的关键参数，需与门体重量、尺寸精准匹配。