How GYJK Portable Hydraulic Shearers Work

A portable hydraulic shearer is a modern and highly efficient rescue tool that combines the functions of a cutter and a spreader. Designed for use in tight spaces and remote environments, it has become an essential device in emergency situations such as earthquakes, car accidents, and construction site incidents. Its ability to quickly cut through metal and expand structures has saved numerous lives, making it a critical component in modern rescue operations.

How Does a Hydraulic Shearer Work?

This advanced tool is powered by a DC motor-driven high-pressure plunger pump, which is usually operated using a nickel-cadmium battery. The pump generates high-pressure hydraulic fluid that is directed into a hydraulic cylinder, causing the piston rod to move back and forth. This motion enables the tool to perform cutting, spreading, and pulling tasks efficiently. Key specifications include a rated working pressure of 63 MPa, a maximum opening distance of at least 160 mm, and a maximum shearing capacity of 10 mm for steel plates (Q235 material) or 20 mm for round bars. It also provides a rated expansion force of 25 kN, with a no-load opening and closing rate of up to 9 times and a no-load closing pressure of less than 11 times. The handle force required is under 300 N, making it user-friendly even during long operations.

The machine weighs less than 10 kg and has dimensions of 735 × 212 × 146 mm, making it compact and easy to transport. One of its main advantages is its lightweight design, allowing rescuers to carry it easily. The hydraulic system ensures stable and powerful performance, while the tubeless design simplifies field operations. The sharp blade can cut through steel, and the strong, wide-opening blades allow for effective expansion. Additionally, the rugged carrying case not only protects the equipment but also helps it endure harsh rescue conditions.

Additional Features – GYJK-25/20-10-A Model

The GYJK-25/20-10-A is another model in the portable shear expander family. Unlike the hydraulic version, this one is manually operated, eliminating the need for an external power source. It automatically switches between high and low pressure, making it ideal for use in underwater environments or areas where there's a risk of explosion. It is safe, reliable, and convenient for various rescue scenarios.

The handle is made from a more comfortable new material, enhancing user safety and ease of operation. The cutter and manual pump can rotate 360 degrees, allowing for flexible use in different orientations and settings. The blade is crafted from remanufactured tool steel, ensuring durability and effectiveness. The unit also comes with customized aluminum crates for easy storage and handling of tools, further improving operational efficiency in the field.