SMC 21-CDU20-40D | Copper/Fluorine/Silicon-Free Free Mount Cylinder CDU Series 20mm Bore 40mm Stroke Double-Acting
SMC
$52.74
The SMC 21-CDU20-40D is a copper, fluorine, and silicon-free free mount cylinder from the CDU series. Part number decoded: CDU = CDU series double acting free mount, 20 = 20mm bore, 40 = 40mm stroke, D = specific option. The 21- prefix designates Cu/F/Si-free construction. The CDU is a compact free mount cylinder similar to the CUJ but typically in a larger bore range.
The CDU free mount design allows installation in virtually any orientation without dedicated mounting brackets. At 20mm bore with 40mm stroke, the cylinder generates approximately 19N at 0.6 MPa. The Cu/F/Si-free construction ensures semiconductor-grade material purity throughout the air path. Free mount cylinders are popular in clean room equipment because they simplify installation, reduce part count, and minimize potential particle generation sources from mounting hardware.
The 21-CDU20-40D provides Cu/F/Si-free free mount actuation at 20mm bore. For the standard clean room CUJ series, the 11-CDUJB16-20D provides the base clean room free mount option. For Cu/F/Si-free guided cylinders, the 21-CDQSB25-30DM provides anti-rotation. For Cu/F/Si-free standard cylinders with mounting options, the 21-CDM2RB40TN provides direct mount capability. RoHS compliant.
- Series:
- 21-CDU (Cu/F/Si-Free)
- Cylinder Type:
- Free Mount
- Action:
- Double-Acting
- Rod:
- Single Rod
- Bore:
- 20mm
- Stroke:
- 40mm
- Option:
- D
- Material:
- Copper Fluorine Silicon Free
- Certifications:
- RoHS
