
SMC CDQ2B4020DZ (CDQ2B40-20DZ) - Compact Air Cylinder, 40mm Bore, 20mm Stroke
SMC CDQ2B4020DZ Compact Air Cylinder — 40 mm bore, 20 mm stroke, Rc 1/8 port thread (blank symbol), double acting with rod end female thread and no rubber bumper (D variant). SMC CDQ2B40-20DZ is a CQ2-Z series compact air cylinder with a 40 mm bore and a 20 mm stroke. The B mounting symbol denotes the through-hole / head-end-tapped body, and the D prefix indicates a built-in auto switch magnet, so D-M9 series solid state and reed auto switches can be fitted in any of the four auto switch mounting grooves (Z). Ports are Rc 1/8 (blank port thread symbol). The cylinder is double acting, single rod, with a standard rod end female thread (M8 x 1.25) and no rubber bumper. Fluid is air, proof pressure 1.5 MPa, maximum operating pressure 1.0 MPa, piston speed 50 to 500 mm/s, non-lube operation. Ambient and fluid temperature range is -10 to 60 degrees C with the auto switch magnet. Theoretical output at 0.5 MPa is 628 N extending and 528 N retracting. Basic mass is 333 g.
MPN: CDQ2B40-20DZ · SKU: CDQ2B4020DZ
CDQ2B40-20DZ Applications
Used where a short, powerful linear stroke is needed in a very small envelope: clamping and part locating in welding and assembly jigs, pushing and stopping on conveyors, gate and diverter actuation, press and punch feeding, and end-of-arm tooling. The built-in magnet lets D-M9 auto switches confirm extended and retracted positions for PLC interlocks, and the through-hole body bolts directly through a machine plate for tight, repeatable mounting in packaging, automotive and general factory automation lines.
CDQ2B40-20DZ Specifications
| Brand | SMC | Manufacturer Part No. | CDQ2B40-20DZ |
| Series | CQ2 (CQ2-Z) | Bore | 40 mm |
| Stroke | 20 mm | Port Thread | Rc 1/8 |
| Action | Double acting, single rod | Mounting | Through-hole / both ends tapped (B) |
| Built-in Magnet | Yes (D) - auto switch capable, 4 mounting grooves | Rod End | Female thread M8 x 1.25 |
| Cushion | Without cushion | Fluid | Air |
| Proof Pressure | 1.5 MPa | Maximum Operating Pressure | 1.0 MPa |
| Piston Speed | 50 to 500 mm/s | Ambient and Fluid Temperature | -10 to 60 degrees C (with auto switch magnet) |
| Lubrication | Not required (non-lube) | Theoretical Output at 0.5 MPa | 628 N (out) / 528 N (in) |
| Weight | 333 g |
CDQ2B40-20DZ Datasheet & Manual
Download Datasheet & ManualSMC CDQ2B4020DZ · PDF · Official SMC documentTrusted by




