The AirTAC Airtac SC40 Standard Cylinder SC40X25 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 SC40X25 is a compact short-stroke double-acting cylinder delivering 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa). Its 40 mm bore and 25 mm stroke suit tight-space clamping, ejecting, or stopping tasks where a full cycle must complete quickly.
Built as a tie-rod cylinder with a 16 mm diameter piston rod and M12x1.25 rod thread, it includes an adjustable air cushion (21 mm cushion length) to soften end-of-stroke impact. The body length A is 142 mm, giving a total extended length of approximately 167 mm.
| Model | Airtac SC40 Standard Cylinder SC40X25 |
|---|---|
| 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.
Applies 628 N at 0.5 MPa to hold workpieces in jigs and fixtures during machining or assembly, fitting into compact tooling envelopes.
Rapid 25 mm stroke ejects small plastic or metal parts from injection molds or stamping dies with consistent force and repeatability.
Acts as a pneumatic stop gate on mini conveyors, extending quickly to halt or separate products in packaging and sorting lines.
For applications needing slightly more force in the same bore family, the SC50 series steps up to 982 N push at 0.5 MPa. If space is critical and the 25 mm stroke is sufficient, this SC40X25 is the right fit. Always match replacement cylinders on five points: bore (40 mm), stroke (25 mm), PT1/4 port thread, basic mount (no accessory bracket), and the absence of a magnet.
Because the stroke is short, side-loading on the 16 mm rod is less of a concern than on long-stroke models, but avoid direct lateral forces without an external guide.
Quick checklist
At 0.7 MPa operating pressure, the SC40X25 produces 879 N of push force and 528 N of pull force on the retract stroke. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N.
This specific model code (SC40X25) does not include the -S magnet option, so the piston does not carry a magnetic ring. To use CMSG/DMSG/EMSG sensors, order SC40X25S which includes a built-in magnet.
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