
SMC CD55B2540 (CD55B25-40) - Compact Air Cylinder, 25mm Bore, 40mm Stroke
SMC CD55B2540 Compact Air Cylinder — 25mm bore, 40mm stroke, female rod end. SMC CD55B25-40 ISO 21287 compact air cylinder, C55 series. Double acting, single rod, 25mm bore, 40mm stroke. Auto-switch mountable (built-in magnet), female rod end thread. Rubber bumper cushion both ends. Max operating pressure 1.0 MPa, min 0.05 MPa, proof pressure 1.5 MPa. Piston speed 50 to 500 mm/s. G1/8 port. Ambient/fluid temperature -10 to 60 C.
MPN: CD55B25-40 · SKU: CD55B2540
CD55B25-40 Applications
The CD55B25-40 is an ISO 21287 compact air cylinder with a 25mm bore and 40mm stroke, balancing force and reach in a slim body. Ideal for automation such as clamping, positioning, and part transfer, with four-side auto-switch mounting for stroke-end sensing on assembly, packaging, and handling equipment.
CD55B25-40 Specifications
| Brand | SMC | Manufacturer Part No. | CD55B25-40 |
| Bore | 25 mm | Stroke | 40 mm |
| Series | C55 | Standard | ISO 21287 |
| Action | Double acting, single rod | Rod End | Female thread |
| Auto Switch | Mountable (built-in magnet) | Cushion | Rubber bumper both ends |
| Max Operating Pressure | 1.0 MPa | Min Operating Pressure | 0.05 MPa |
| Proof Pressure | 1.5 MPa | Piston Speed | 50 to 500 mm/s |
| Port Size | G1/8 | Ambient/Fluid Temperature | -10 to 60 C (with auto switch) |
| Fluid | Air |
CD55B25-40 Datasheet & Manual
Download Datasheet & ManualSMC CD55B2540 · PDF · Official SMC documentTrusted by




