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CQSB Series Compact Thin Pneumatic Cylinder CQSB Series Compact Thin Pneumatic Cylinder CQSB Series Compact Thin Pneumatic Cylinder CQSB Series Compact Thin Pneumatic Cylinder

CQSB Series Compact Thin Pneumatic Cylinder

  • CQSB cylinder
  • compact thin pneumatic cylinder
  • double acting air cylinder
  • ø12-25mm actuator
  • 4-sided auto switch cylinder
  • non-lube automation cylinder
  • space-saving actuator
  • SMC compact cylinder
  • industrial pneumatic actuator
  • through-hole mounting cylinder
The SMC Type CQSB Series is a high-precision compact thin pneumatic cylinder engineered for space-constrained industrial automation applications. Designed with a square body structure, it combines a slim profile with robust performance, delivering stable linear motion and reliable actuation while minimizing installation footprint—perfect for small-scale automation equipment and tight mounting spaces.

Built to SMC’s rigorous quality standards, the CQSB series adopts a non-lubricated design, eliminating the need for additional lubrication and reducing maintenance costs. Its high-precision honed cylinder barrel and wear-resistant sealing components ensure low friction, long service life, and consistent operation even under continuous working conditions. With flexible mounting options and universal auto-switch compatibility, it integrates seamlessly into various automation systems.


  • Compact Square Body: Ultra-slim design optimizes space utilization, ideal for tight installation environments.

  • 4-Sided Auto Switch Mounting: Grooves on all four sides of the cylinder body allow flexible installation of SMC auto switches (e.g., D-M9 series) for precise position detection.

  • Non-Lubricated Operation: Maintenance-free design compatible with standard industrial compressed air systems, reducing operational costs.

  • Versatile Mounting Options: Supports through-hole mounting, both ends tapped mounting, as well as optional flange, foot, and double clevis mounts for diverse installation needs.

  • Durable Construction: High-strength materials and precision machining ensure excellent wear resistance and long service life.

  • Wide Temperature Adaptability: Operating temperature range of -10°C to 70°C (without auto switch) and -10°C to 60°C (with auto switch), suitable for various industrial environments.

  • Long Stroke Option: Standard stroke 5–50mm, with long stroke variants available up to 300mm to meet specific application requirements.

Technical Specifications

  • Bore Sizes: ø12, 16, 20, 25 mm

  • Action Type: Double acting, single rod

  • Standard Stroke: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 mm (long stroke up to 300 mm available)

  • Maximum Operating Pressure: 1.0 MPa (Proof Pressure: 1.5 MPa)

  • Piston Speed: 30–400 mm/s (standard type)

  • Port Thread: M5 × 0.8 (ø12/16), M6 × 1.0 (ø20/25)

  • Cushion: None (rubber bumper included for long stroke models)

  • Mounting Types: Through-hole, both ends tapped, flange, foot, double clevis

Applications

Widely used in electronic assembly, fixture clamping, precision positioning, material pushing, and light-duty material handling. Particularly suitable for automation equipment with limited installation space, such as electronic manufacturing machinery, medical devices, and small-scale industrial automation systems.


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