SMC 11-CDQSXB12-30D | Clean Room Low Speed Cylinder CQSX Series 12mm Bore 30mm Stroke Double-Acting Anti-Stick-Slip Guided

The SMC 11-CDQSXB12-30D is a clean room specification low speed cylinder from the CQSX series with anti-stick-slip technology. Part number decoded: CDQSX = CQSX series double acting with guide and low speed (X), B = both ends tapped, 12 = 12mm bore, 30 = 30mm stroke, D = option. The CQSX series builds on the CQS guided compact platform by adding internal velocity control that enables smooth, consistent motion at low speeds without the jerky stick-slip behavior that standard cylinders exhibit.

Standard pneumatic cylinders move in a jerky, uncontrolled manner at very low speeds because static friction (stiction) between the piston seals and bore is higher than dynamic friction. The piston sticks, pressure builds, then the piston breaks free and lurches forward until it sticks again. The CQSX series uses a special internal mechanism to eliminate this stick-slip behavior, providing smooth, controllable motion even at speeds below 50mm/sec. This is essential for clean room applications involving delicate wafer handling, optical component positioning, and precision adhesive dispensing.

The CDQSXB12-30D provides anti-stick-slip guided motion at 12mm bore with 30mm stroke. For standard-speed guided motion without low-speed control, the CDQSB12 (CQS series) provides the base guided platform. For larger bore low-speed operation, the CDQSXB16 and CDQSXB25 increase force output. For the unguided compact version, the CDQ2B12 provides the simplest CQ2 option. The CQSX is the premium choice when motion quality matters more than speed. Clean series (11-) fluorine grease. RoHS compliant.