The AirTAC Airtac SC40 Standard Cylinder SC40X305S is a genuine double-acting standard air cylinder with a Ø40mm bore and 305mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X305S is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, combining a 40 mm bore with a 305 mm stroke. This model generates 628 N of push force and 528 N of pull force when operated at 0.5 MPa, making it a capable mid-range actuator for light automation tasks.
The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for precise, non-contact position sensing. With a 16 mm diameter piston rod, M12x1.25 rod thread, and PT1/4 ports, it features a 21 mm adjustable air cushion at each end to decelerate the piston smoothly, reducing impact noise and vibration.
| Model | Airtac SC40 Standard Cylinder SC40X305S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 305 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. |
| ×305 | 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 305 mm stroke and 628 N push force at 0.5 MPa are ideal for actuating gates or diverters on conveyor lines, reliably pushing packages or components onto different lanes. The built-in magnet enables end-of-stroke confirmation with a simple sensor.
Provides a consistent clamping or pressing action for small-part assembly fixtures. The adjustable cushion ensures a soft stop at the end of the 305 mm travel, protecting delicate components from impact damage during high-speed cycles.
Delivers the precise linear motion needed for label applicators or hot-stamp presses. The cylinder's 16 mm rod and tie-rod construction offer stable guidance for the 305 mm extension, maintaining alignment for consistent print quality.
For applications requiring slightly more force, consider stepping up to the 50 mm bore SC50 series, which offers 982 N of push force at the same 0.5 MPa pressure. This 305 mm stroke is within the 1200 mm maximum standard stroke for the 40 mm bore, ensuring standard availability. The 16 mm rod is robust for axial loads, but for this stroke length, avoid significant side loading without an external guide rail to prevent rod bearing wear and bending.
When replacing an existing cylinder, ensure a 5-point match: 40 mm bore, 305 mm stroke, PT1/4 port thread, the built-in magnet for sensor compatibility (-S), and the basic mounting style. This is a tie-rod cylinder with a specific body length (A=142 mm), not an ISO 15552 profile, so dimensional interchangeability is limited to other AirTAC SC40 tie-rod units.
Quick checklist
At a common factory air pressure of 0.7 MPa, the SC40X305S generates a push force of 879 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.
Yes. The 'S' in the model code signifies a built-in magnet on the piston. This allows you to clamp compatible AirTAC CMSG, DMSG, or EMSG sensors directly onto the cylinder barrel's tie-rod slots to detect piston position without any additional brackets.
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