The AirTAC Airtac SC40 Standard Cylinder SC40X940S is a genuine double-acting standard air cylinder with a Ø40mm bore and 940mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X940S is a double-acting tie-rod cylinder with a 40 mm bore and a 940 mm stroke, delivering a push force of 628 N at 0.5 MPa and up to 1130 N at the maximum operating pressure of 0.9 MPa. Its 16 mm diameter piston rod and 21 mm adjustable air cushion provide smooth deceleration, while the built-in magnet (-S suffix) allows direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the barrel for reliable end-of-stroke detection.
With a compact body length of 142 mm, this cylinder is notably shorter than an equivalent ISO 15552 profile unit, making it a space-efficient choice for automation tasks. The standard PT1/4 port and M12x1.25 rod thread ensure straightforward pneumatic integration, and the TPU seals offer a standard operating range of -20 to +70 °C.
| Model | Airtac SC40 Standard Cylinder SC40X940S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 940 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. |
| ×940 | 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.
Moves components between distant conveyor lanes or workstations. The 940 mm stroke bridges wide gaps, and the integrated magnet enables precise position confirmation at each end.
Drives a dispensing head across a large panel or workpiece. The sensor-ready barrel provides accurate cycle counting and end-of-travel signals for consistent bead application.
Positions a stop gate or pusher plate across a wide roller conveyor. The 628 N force at 0.5 MPa is well-suited for aligning lightweight cartons or trays in logistics systems.
For applications requiring slightly more force, consider stepping up to the 50 mm bore SC50 series, which provides 982 N of push force at 0.5 MPa. At a 940 mm stroke, the unsupported rod length is significant; any side loading, even minor, can cause rod deflection and accelerated bearing wear. It is strongly recommended to use an external linear guide or a guided cylinder assembly to absorb transverse forces and protect the rod bearing.
When replacing an existing cylinder, ensure a 5-point match: 40 mm bore, 940 mm stroke, PT1/4 port thread, the built-in magnet for sensor compatibility, and the basic (no bracket) mounting configuration. This model is a direct replacement for another AirTAC SC40X940S tie-rod cylinder.
Quick checklist
At 0.5 MPa (approximately 72.5 psi), the cylinder produces a theoretical push force of 628 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1130 N. Always factor in a safety margin for friction and dynamic loads.
No. The AirTAC SC series is a tie-rod cylinder and is physically shorter than an ISO 15552 profile cylinder, so mounting dimensions and overall length will not match. This SC40X940S should only be used to replace another AirTAC SC40 tie-rod cylinder with identical bore, stroke, and magnet option.
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