The AirTAC Airtac SC40 Standard Cylinder SC40X78S is a genuine double-acting standard air cylinder with a Ø40mm bore and 78mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X78S is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, featuring a 40 mm bore and a 78 mm stroke. This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the barrel for reliable end-of-stroke detection without external brackets.
At 0.5 MPa, it generates a push force of 628 N and a pull force of 528 N, driven by a 16 mm diameter piston rod with an M12x1.25 thread. The cylinder body length is 142 mm, resulting in a compact extended length of 220 mm. It uses PT1/4 ports and operates with an adjustable pneumatic cushion of 21 mm to decelerate the load smoothly.
| Model | Airtac SC40 Standard Cylinder SC40X78S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 78 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. |
| ×78 | 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.
The 78 mm stroke and sensor-ready magnet make this cylinder ideal for actuating diverter gates on packaging lines, where mid-stroke position confirmation prevents product jams.
Delivers 628 N of clamping force with electronic verification. The CMSG/DMSG sensor confirms the clamp is fully engaged before a machining or welding cycle starts.
Used in material test fixtures requiring a clean, repeatable 78 mm linear stroke. The magnetic piston allows cycle counting and end-of-travel signaling for data acquisition systems.
Choose the SC40X78S when your application requires a 40 mm bore with sensor feedback for position confirmation. If you need more force, stepping up to the 50 mm bore provides 982 N of push force at the same 0.5 MPa pressure. For lighter, more compact needs, the 32 mm bore offers 402 N.
When replacing an existing cylinder, ensure a 5-point match: 40 mm bore, 78 mm stroke, PT1/4 port thread, the built-in magnet option (-S suffix), and the basic mounting configuration. This is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profile cylinders.
Quick checklist
At the standard operating pressure of 0.5 MPa, the cylinder provides a theoretical push force of 628 N and a pull force of 528 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1130 N.
Yes. The -S suffix indicates a built-in magnet in the piston. You can directly clamp AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors onto the barrel's external tie-rod slots to detect piston position without any additional mounting hardware.
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