
SMC CD85N20300CB (CD85N20-300C-B) - Mini Air Cylinder, 20 mm bore, 300 mm stroke
SMC CD85N20300CB Mini Air Cylinder — 20 mm bore, 300 mm maximum standard stroke, air cushion (C) both ends, 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, 300 mm stroke (the longest standard stroke for the 20 mm bore), air cushion (C) 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 0.66 J with air cushion. Ambient and fluid temperature -10 to 60 C for the built-in magnet type. Conforms to ISO 6432 and CETOP RP52P.
MPN: CD85N20-300C-B · SKU: CD85N20300CB
CD85N20-300C-B Applications
At 300 mm this is the longest standard stroke offered for the 20 mm bore C85, so it is the go-to size for long pushers, ejectors, lift columns and door or hood actuation without moving to a made-to-order length. Air cushioning is important at this travel because the piston reaches higher speed before impact; it absorbs up to 0.66 J and is adjustable via cushion needles. Watch lateral load and consider a guide for unsupported long strokes.
CD85N20-300C-B Specifications
| Brand | SMC | Manufacturer Part No. | CD85N20-300C-B |
| Series | C85 (ISO 6432) | Type | Mini air cylinder, double acting, single rod |
| Bore | 20 mm | Stroke | 300 mm |
| Cushion | Air cushion (C) | 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 | 0.66 J (air cushion) |
| Ambient and Fluid Temperature | -10 to 60 C (built-in magnet type) | Lubrication | Not required |
| Standard Stroke Range (20 mm bore) | 10 to 300 mm | Standards | ISO 6432, CETOP RP52P |
CD85N20-300C-B Datasheet & Manual
Download Datasheet & ManualSMC CD85N20300CB · PDF · Official SMC documentTrusted by




