SMC 11-CDG1BN25-150FZ | Clean Room Air Cylinder CG1 Series 25mm Bore 150mm Stroke Double-Acting Single Rod Round Body Non-Rotating

The SMC 11-CDG1BN25-150FZ is a clean room specification air cylinder from the CG1 series with non-rotating piston rod. Part number decoded: CDG1 = CG1 series double acting, B = basic type, N = non-rotating rod option, 25 = 25mm bore, 150 = 150mm stroke, F = specific option (typically flange or foot mount variant), Z = clean room auto-switch groove. The N suffix is the critical differentiator — it adds an internal mechanism that prevents the piston rod from rotating during extension and retraction.

Why choose a non-rotating rod cylinder? Standard cylinders allow the piston rod to rotate freely, which is acceptable when the rod connects to a guided mechanism. However, when the cylinder directly drives a tooling fixture, gripper, or sensor that must maintain angular orientation throughout the stroke, rod rotation causes misalignment. The N (non-rotating) option uses a key or spline mechanism inside the cylinder to constrain rotational movement, ensuring the rod tip maintains its angular position throughout travel. This eliminates the need for an external guide or anti-rotation bracket.

The CDG1BN25-150FZ provides non-rotating capability in a 25mm bore, 150mm stroke configuration. For standard rotating rod at 25mm bore, the CDG1BA25 or CDG1B25 provides the base option. For guided linear motion with higher rigidity, the MGF guide table series provides dual-rod anti-rotation with bearing guides. The 25mm bore generates approximately 29N at 0.6 MPa, suited for light-duty positioning in clean room assembly and inspection equipment. Clean series (11-) fluorine grease. RoHS compliant.