The AirTAC Airtac SC40 Standard Cylinder SC40X1250 is a genuine double-acting standard air cylinder with a Ø40mm bore and 1250mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X1250 is a double-acting tie-rod cylinder with a 40 mm bore and an extended 1250 mm stroke, built for applications requiring a long reach in a compact body width. This model pushes with 628 N at 0.5 MPa and reaches 1130 N at 0.9 MPa, driven by a 16 mm diameter piston rod with M12x1.25 male threads.
At 1250 mm, the stroke exceeds the standard 1200 mm maximum for the 40 bore, making this a made-to-order non-standard length. The cylinder includes an adjustable pneumatic cushion (21 mm length) to decelerate the piston smoothly, and its PT1/4 ports accept standard pneumatic fittings. The total extended body length is approximately 1392 mm.
| Model | Airtac SC40 Standard Cylinder SC40X1250 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 1250 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. |
| ×1250 | 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 1250 mm stroke pushes or pulls components across wide conveyor gaps or between distant stations in automated assembly lines.
Raises and lowers sealing heads or filling nozzles with a 628 N push force at standard plant pressure, fitting into narrow machine frames.
Operates tall diverter gates on material handling chutes, using the full 1250 mm travel to swing a gate through its complete arc.
Choose the SC40 when the 32 bore's 402 N push at 0.5 MPa is insufficient, but a 50 bore (982 N) would be oversized for the load. For this 1250 mm stroke, the long unsupported rod is susceptible to bending under side loads; install an external linear guide or use a guided cylinder if the load is not purely axial. When replacing an existing unit, match five points exactly: 40 mm bore, 1250 mm stroke, PT1/4 port thread, basic mount (no accessory bracket), and no magnet.
Quick checklist
At 0.7 MPa operating pressure, the 40 mm bore generates 879 N of push force. The pull force on the return stroke is lower due to the 16 mm rod area, delivering 528 N at 0.5 MPa.
Only if the load is purely axial and the rod is not subjected to any side forces. For any off-centre load, an external linear guide rail is strongly recommended to prevent rod bending and premature seal wear on this long-stroke model.
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