Cylinder Body (Pneumatic)

The cylinder body is the primary structural component of a pneumatic actuator that forms a sealed chamber where compressed air acts on a piston to generate linear motion. It provides mounting points, contains pressure, and guides the piston rod. This directory entry covers cylinder bodies for pneumatic cylinders conforming to ISO 15552, with bore diameters from 32 to 320 mm and stroke lengths from 25 to 2000 mm (custom strokes up to 3000 mm possible). Operating pressure ranges from 0.1 to 1.0 MPa, and operating temperature from -20 to 80°C. Piston speed can be 0.1 to 1.5 m/s. Cylinder wall thickness varies from 3 to 10 mm depending on bore size and pressure rating. The bore surface roughness is Ra 0.2 to 0.4 μm per ISO 1302, critical for seal performance and wear. Standard material is aluminum alloy 6063-T5 per GB/T 6892; stainless steel and carbon steel are optional. Weight ranges from 1.5 to 120 kg depending on bore, stroke, and material. These values are reference ranges; actual specifications must be confirmed with the manufacturer or supplier for the specific model. The cylinder body must be selected based on required force, stroke, mounting style, and environmental conditions. Verification questions include: What is the required bore size and stroke? What operating pressure and temperature are expected? What mounting interfaces are needed? What surface finish is specified? Maintenance signals include visible wear, scoring, or corrosion on the bore, leakage past seals, and reduced performance. Failure boundaries include exceeding maximum pressure or temperature, which can cause deformation or seal failure. Always consult the legal manufacturer or supplier for model-specific values and standards.

The cylinder body serves as a pressure vessel that contains compressed air. When air enters through ports, it creates differential pressure across the piston, causing linear motion. The body maintains structural integrity under pressure and provides a smooth bore for piston movement. The bore surface finish and dimensional accuracy are critical for sealing and low friction. The body also transfers forces to the machine structure through mounting points. Proper material selection and wall thickness ensure safe operation within rated pressure and temperature limits.