Pneumatic cylinders are primarily classified by structure and movement mode, with three core types widely used in industrial applications. Below is a concise, practical breakdown for technical documentation or client communication:
1. Single-Acting Cylinder (SAC)
- Core Principle: Compressed air drives the piston in one direction; a spring (or gravity) resets it in the reverse direction.
- Key Features: Simple structure, low air consumption, compact size; limited force in the reset direction.
- Typical Applications: Clamping, lifting, ejecting, or short-stroke positioning (e.g., workpiece clamping in assembly lines, door opening/closing mechanisms).
2. Double-Acting Cylinder (DAC)
- Core Principle: Compressed air drives the piston in both extension and retraction directions (two air inlets/outlets for bidirectional control).
- Key Features: Balanced force in both directions, adjustable speed/stroke, high versatility.
- Typical Applications: Reciprocating motion tasks (e.g., conveyor belts, robotic arms, punching machines, material handling equipment).
3. Telescopic Cylinder (Multi-Stage Cylinder)
- Core Principle: Equipped with nested, multi-section pistons; extends to a long stroke but retracts to a compact length.
- Key Features: High stroke-to-installation-length ratio; suitable for limited space with long-stroke needs.
- Typical Applications: Heavy machinery (e.g., dump truck lifting, forklift tilting), door mechanisms, or equipment requiring extended reach in tight spaces.
Bonus: Common Specialized Type (for reference)
- Rotary Pneumatic Cylinder: Converts linear air pressure into rotational motion (e.g., 90°/180° indexing, valve switching).