The AirTAC Airtac SC40 Standard Cylinder SC40X25N is a genuine double-acting standard air cylinder with a Ø40mm bore and 25mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X25N is a compact-stroke double-acting pneumatic cylinder from the AirTAC SC tie-rod series, delivering a push force of 628 N at 0.5 MPa (1130 N at 0.9 MPa). Its 25 mm stroke suits short clamping, ejecting, and positioning tasks where space is tight and rapid cycling is required.
This model is fitted with NBR (nitrile) seals as standard, offering reliable performance within the standard -20 to +70 °C temperature range. The 40 mm bore uses a 16 mm diameter piston rod with an M12x1.25 male thread and PT1/4 ports, providing a balanced combination of force and compact dimensions for light automation fixtures.
| Model | Airtac SC40 Standard Cylinder SC40X25N |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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. |
| ×25 | 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 25 mm stroke provides a sharp, controlled push to eject small plastic or metal parts from a die or conveyor stop, leveraging the 628 N force at 0.5 MPa.
Ideal for a light-duty welding or assembly jig where a short, firm clamping action is needed. The NBR seals handle standard shop air conditions reliably.
Delivers a quick, repeatable linear stroke for applying labels or ink stamps to flat surfaces on a packaging line, with the 16 mm rod ensuring good alignment.
Choose the SC40 bore for light pressing or sorting where the 628 N push force at 0.5 MPa is sufficient. If your load demands more force, step up to the SC50 bore which provides 982 N at the same pressure. For a stroke this short, side-load bending is rarely a concern, but always align the rod axially with the load to prevent seal wear.
When replacing an existing cylinder, match five key points: 40 mm bore, 25 mm stroke, PT1/4 port thread, basic (no accessory) mounting, and the absence of a magnet. This NBR-sealed variant is a direct fit for other SC40X25N units; always verify the seal material matches your application's chemical and temperature requirements.
Quick checklist
At the standard operating pressure of 0.5 MPa, the push force is 628 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, it is dimensionally identical and will fit. NBR seals offer good wear resistance for standard temperatures (-20 to +70 °C). Ensure your application does not require the higher abrasion resistance of TPU or the high-temperature capability of Viton before switching seal materials.
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