What are the common specifications for hydraulic cylinder barrels?

[KhloeDella]

Common specifications for hydraulic cylinder barrels include 32mm barrel diameter with 18mm rod diameter, 40mm barrel diameter with 20/22/25mm rod diameter, and 50mm barrel diameter with 25/28/32mm rod diameter. Below is more relevant information: Barrel material: Commonly used materials are 20#, 35#, and 45# seamless steel pipes, which undergo honing or rolling to achieve a surface roughness requirement within 0.4μm. Low-pressure cylinders can use 20# steel pipes, while high-pressure cylinders use 45# steel pipes. Piston rod material: Piston rods come in solid and hollow types. Hollow piston rods require ventilation holes at one end for welding and heat treatment purposes. Solid piston rods are made of 35# or 45# steel, while hollow ones use 35# or 45# seamless steel pipes. After rough machining, piston rods are tempered to achieve a hardness of 229285HB, and when necessary, undergo high-frequency quenching to reach 4555HRC hardness.