The AirTAC Airtac SC40 Standard Cylinder SC40X20 is a genuine double-acting standard air cylinder with a Ø40mm bore and 20mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X20 is a compact-stroke member of the AirTAC SC tie-rod cylinder family, delivering a push force of 628 N at 0.5 MPa and up to 1130 N at the maximum operating pressure of 0.9 MPa. Its 16 mm diameter piston rod and PT1/4 port provide a responsive flow path for rapid cycling in short-throw applications.
With a body length A of just 142 mm and a 20 mm stroke, this cylinder's total extended length is approximately 162 mm, making it an excellent fit for tight machine envelopes. The adjustable air cushion (21 mm length) effectively decelerates the end-of-stroke travel, reducing impact noise and vibration for consistent operation.
| Model | Airtac SC40 Standard Cylinder SC40X20 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Provides a quick, 628 N clamping action for holding small parts in CNC fixtures or assembly jigs where space is limited and cycle speed is critical.
Delivers a sharp, controlled push to eject lightweight components from a conveyor line or stamping die, with the adjustable cushion softening the return stroke.
Operates small ball or butterfly valves with a direct, linear 20 mm throw, offering reliable pneumatic actuation for process control systems.
For applications needing more force, stepping up to the SC50 bore provides 982 N of push at 0.5 MPa. The SC40X20's short stroke minimizes rod bearing stress, but for any stroke beyond 300 mm on this bore, consider an external guide to manage potential side loads. To ensure a correct replacement, match five key points: 40 mm bore, 20 mm stroke, PT port thread, the specific mounting accessory, and the presence or absence of a magnet.
Quick checklist
At the standard 0.5 MPa operating pressure, the SC40X20 generates 628 N of force when extending (push) and 528 N when retracting (pull). The maximum force at 0.9 MPa is 1130 N.
No. The AirTAC SC series is a tie-rod cylinder and is shorter than the ISO 15552 standard, so it is not dimensionally interchangeable. It is a direct replacement only for another AirTAC SC40 cylinder with a 20 mm stroke and matching port and mounting configuration.
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