SMC 10-CDG1LN20-25Z | 10-/11-CG1-Z Series Clean Room Air Cylinder Double Acting Single Rod 20mm Bore 25mm Stroke Lock-Up Type

The SMC 10-CDG1LN20-25Z is a clean room specification lock-up type round body air cylinder from the 10-/11-CG1-Z series, configured with a 20mm bore and compact 25mm stroke. The "L" designation in the part number indicates this cylinder includes an integrated rod lock mechanism that mechanically holds the piston rod in position when air supply is removed or during power loss, preventing uncontrolled rod movement that could damage workpieces or create safety hazards in clean room automation equipment.

When is a lock-up cylinder essential in clean room applications? Lock-up cylinders are specified wherever gravity-loaded or spring-loaded mechanisms could move uncontrollably during power loss, emergency stops, or planned air supply shutdown. Common applications include vertical lift mechanisms where the cylinder holds a load against gravity, workpiece clamps that must maintain grip during power interruptions, and safety-critical positioning applications in semiconductor handling equipment where uncontrolled movement could damage high-value wafers or substrates.

The compact 20mm bore and 25mm stroke configuration targets small mechanism actuation where both clean room cleanliness and fail-safe position holding are required simultaneously. The lock engages automatically when air pressure drops below the operating threshold, providing passive safety without requiring additional control logic or separate locking devices.

The "10-" clean series specification ensures fluorine grease, clean room assembly, and anti-static double packaging for particle generation grade 1 compliance. This cylinder is RoHS compliant and compatible with SMC auto-switches for position detection.