What are the models and specifications of hydraulic cylinders?

[LaCody]

Common standards include Φ140/100-800, which means the cylinder bore is 140, the rod diameter is 100, and the stroke is 800. For three-stage and four-stage hydraulic cylinders, the rated working pressure is 19MPa, the stroke ranges from 3880 to 6200mm, the maximum extending sleeve diameter is 195mm, and the cylinder thrust is 20-56 tons. The structural composition of hydraulic cylinders is introduced as follows: Introduction 1: The hydraulic cylinder of a hydraulic press consists of a cylinder head (guide sleeve), cylinder body, piston rod, piston head, sealing device, buffer device, and exhaust system. The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy for linear motion. The hydraulic cylinder has a simple structure, smooth movement, and reliable operation. Introduction 2: The cylinder body of the hydraulic cylinder is made of high-quality carbon structural steel forgings to ensure material uniformity. The inner hole of the cylinder is subjected to strong rolling to improve surface smoothness, precision, hardness, and high rigidity, with good wear resistance. The hydraulic cylinder has a long service life. The piston rod and piston head of the hydraulic cylinder are made of carbon structural steel forgings, with chrome plating and fine grinding on the surface, providing high hardness and strong pressure resistance. Introduction 3: The sealing device of the hydraulic cylinder uses imported high-quality sealing rings, which have excellent wear resistance and heat resistance, low friction, avoiding cylinder leakage, ensuring reliable operation and extending the service life of the sealing rings. Introduction 4: The buffer device of the hydraulic cylinder can slow down the piston at the end of the stroke and bring the speed close to zero, reducing the inertial force of the piston moving parts and preventing collisions between the piston parts and the cylinder body, thereby reducing noise and vibration, avoiding damage to the hydraulic cylinder body, and extending the service life of the hydraulic cylinder. The exhaust system of the hydraulic cylinder ensures the smooth operation of the hydraulic cylinder and prevents intermittent impact forces and vibrations.

[Rosa]

I have been working with hydraulic cylinders for over a decade. Common ones include HSG series engineering cylinders, like the 80/45-500 model used for excavator arms—this means 80mm bore diameter, 45mm piston rod, and 500mm stroke. Selecting hydraulic cylinders isn’t just about the model numbers; real-world conditions matter. The working pressure must match the system—for example, using a 16MPa cylinder in a 25MPa system will burst pipes. Environmental temperature affects seal life, so high-temperature summer conditions call for fluororubber seals. Last time I replaced a cylinder at a mixing station, I learned the hard way about not measuring the installation distance—it took three hours of disassembly and reassembly. Cylinder barrel material is also crucial; for high-frequency applications, 27SiMn offers far better fatigue resistance than standard #45 steel.

[DePaul]

The most headache when purchasing equipment is selecting hydraulic cylinders, as the model numbers look like gibberish. For single-acting cylinders, use the DG/JB standard, while for double-acting ones, opt for the HSG or CD series, such as the commonly used 63mm bore size with cushioning in machine tools. Key parameters to consider: system pressure determines cylinder wall thickness—for 31.5 MPa, forged steel cylinders are required; stroke relates to the equipment's range of motion, but beware that excessively long strokes can easily bend the piston rod; speed affects the selection of port size—if speed exceeds 0.5 m/s, large-diameter valves are needed. Last time we ordered hydraulic cylinders for an automated production line, we miscalculated the load inertia, and the piston rod deformed directly. It's advisable to send the equipment's working condition diagram to the supplier for assistance in selection—it's both convenient and safe.