The AirTAC Airtac SC40 Standard Cylinder SC40X250S is a genuine double-acting standard air cylinder with a Ø40mm bore and 250mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X250S is a double-acting tie-rod cylinder delivering 628 N of push force at 0.5 MPa (1130 N at the maximum operating pressure of 0.9 MPa). Its 40 mm bore houses a 16 mm diameter piston rod with an M12x1.25 male thread, and the 250 mm stroke makes it a solid choice for medium-reach clamping, pressing, and material-transfer tasks.
This model includes the factory-fitted -S magnet, so CMSG, DMSG, or EMSG reed and solid-state sensors clip directly onto the barrel for non-contact position sensing. The adjustable pneumatic cushion at each end (21 mm length) decelerates the piston smoothly, and the PT1/4 port threads accept standard pneumatic fittings. The body length A is 142 mm, giving an extended length of approximately 392 mm.
| Model | Airtac SC40 Standard Cylinder SC40X250S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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. |
| ×250 | 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 628 N push force at 0.5 MPa and 250 mm stroke suit medium-duty workpiece clamping in CNC fixtures and assembly jigs, with magnetic sensors confirming jaw position.
Pushes or diverts packages and small components on conveyor lines. The built-in magnet allows end-of-stroke detection to sequence the next operation reliably.
Generates up to 1130 N at 0.9 MPa for inserting bearings, bushings, or pins. The adjustable cushion protects the tooling from impact at the end of the press stroke.
Choose the SC40 bore when your application needs between roughly 400 and 1100 N of push force; the 40 mm bore provides 628 N at a common 0.5 MPa supply. If your load exceeds 900 N at 0.5 MPa, step up to the SC50 (982 N at 0.5 MPa) to gain a 20 mm rod and greater rigidity. For lighter, faster cycles, the SC32 (402 N at 0.5 MPa) may be a better fit.
At a 250 mm stroke, side-loading on the 16 mm rod should be minimal; if the load is not guided externally, consider adding a linear guide or switching to a guided cylinder. For direct replacement, match five points: bore (40 mm), stroke (250 mm), port thread (PT1/4), mounting accessory (basic), and the built-in magnet (-S) for sensor compatibility.
Quick checklist
At 0.5 MPa the cylinder produces 628 N pushing and 528 N pulling. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
Yes. The -S suffix indicates a built-in magnet, so AirTAC CMSG (reed) and DMSG/EMSG (solid-state) sensors mount directly on the barrel tie-rods. If you are replacing an older SC40 without the -S option, you must order the -S version to retain sensor functionality.
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