
SMC CD85N20250B (CD85N20-250-B) - Mini Air Cylinder, 20 mm bore, 250 mm stroke
SMC CD85N20250B Mini Air Cylinder — 20 mm bore, 250 mm long stroke, rubber bumper (no air cushion), band mounting for auto switch. SMC C85 series ISO 6432 mini air cylinder, double acting, single rod, with built-in magnet (D) for auto switch detection. Basic mounting type (N), 20 mm bore, 250 mm stroke, rubber bumper cushioning and band mounting (B) for auto switches. Piston rod diameter 8 mm with M8 x 1.25 rod thread, G 1/8 port size. Air operated, 1.0 MPa maximum operating pressure, 1.5 MPa proof pressure, piston speed 50 to 1500 mm/s, allowable kinetic energy 0.27 J with rubber bumper. Ambient and fluid temperature -10 to 60 C for the built-in magnet type. 250 mm is a standard stroke for the 20 mm bore. Conforms to ISO 6432 and CETOP RP52P.
MPN: CD85N20-250-B · SKU: CD85N20250B
CD85N20-250-B Applications
The 250 mm stroke makes this C85 suited to long-travel pushing, transfer and lifting duties such as pusher arms, feed slides, diverter gates and stopper mechanisms on conveyors and packaging lines. Rubber bumper cushioning is best for light to moderate loads at controlled speeds; check kinetic energy against the 0.27 J limit and choose the air cushion version for heavier or faster loads. Band-mounted auto switches sense the built-in magnet to give end-position feedback anywhere along the barrel.
CD85N20-250-B Specifications
| Brand | SMC | Manufacturer Part No. | CD85N20-250-B |
| Series | C85 (ISO 6432) | Type | Mini air cylinder, double acting, single rod |
| Bore | 20 mm | Stroke | 250 mm |
| Cushion | Rubber bumper | Built-in Magnet | Yes (auto switch capable) |
| Auto Switch Mounting | Band mounting (B) | Mounting Style | Basic (N) |
| Piston Rod Diameter | 8 mm | Piston Rod Thread | M8 x 1.25 |
| Port Size | G 1/8 | Fluid | Air |
| Proof Pressure | 1.5 MPa | Max. Operating Pressure | 1.0 MPa |
| Piston Speed | 50 to 1500 mm/s | Allowable Kinetic Energy | 0.27 J (rubber bumper) |
| Ambient and Fluid Temperature | -10 to 60 C (built-in magnet type) | Lubrication | Not required |
| Standards | ISO 6432, CETOP RP52P |
CD85N20-250-B Datasheet & Manual
Download Datasheet & ManualSMC CD85N20250B · PDF · Official SMC documentTrusted by




