The AirTAC Airtac SC40 Standard Cylinder SC40X255S is a genuine double-acting standard air cylinder with a Ø40mm bore and 255mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X255S is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, featuring a 40 mm bore and a 255 mm stroke. This specific model includes a built-in magnet (-S suffix), allowing for direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the barrel for contactless position detection. Operating on filtered air at 0.15–1.0 MPa, it generates a push force of 628 N at 0.5 MPa and 1130 N at the maximum 0.9 MPa operating pressure.
With a 16 mm diameter piston rod and an M12x1.25 rod thread, this cylinder is built for robust cycling. The stroke of 255 mm exceeds the standard maximum of 1200 mm for this bore, marking it as a non-standard, made-to-order length. The total extended body length is approximately 397 mm, based on a 142 mm body length plus the stroke. TPU seals provide a standard operating temperature range of -20 to +70 °C, and the 21 mm adjustable air cushion at each end ensures smooth deceleration.
| Model | Airtac SC40 Standard Cylinder SC40X255S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 255 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. |
| ×255 | 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 255 mm stroke and sensor-ready design make it ideal for pushing components into fixtures or transferring parts between assembly stations where mid-stroke confirmation is required.
Used as a pneumatic stop or diverter on conveyor lines, the 628 N force at 0.5 MPa effectively manages packages, while the built-in magnet confirms the gate position.
Drives a sealing jaw or label applicator through a 255 mm linear motion, with sensors detecting end-of-stroke to ensure consistent seal pressure and cycle completion.
Select the SC40X255S when your application requires a 40 mm bore and a precise 255 mm stroke with sensor feedback. If your force requirements increase, stepping up to the SC50 series provides 982 N of push force at 0.5 MPa. For strokes of this length, ensure the load is guided to prevent side-loading the 16 mm rod, which can cause premature bearing wear and seal failure. An external guide or a guided cylinder is recommended for unsupported radial loads.
As a direct replacement, this model matches any AirTAC SC40 cylinder with a 255 mm stroke, PT ports, TPU seals, and a magnet-equipped barrel. It is not dimensionally interchangeable with ISO 15552 cylinders, which have a longer body profile.
Quick checklist
At the standard 0.5 MPa operating pressure, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1130 N. The theoretical maximum force at 1.0 MPa is 128 kgf.
No. The SC40X255S is a double-acting cylinder and does not lock or hold position when air pressure is removed or the valve is centered. The piston will drift or drop under load. If load holding is required, you must add an external rod lock, a pilot-operated check valve, or a mechanical brake.
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