The AirTAC Airtac SC40 Standard Cylinder SC40X785S is a genuine double-acting standard air cylinder with a Ø40mm bore and 785mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X785S is a double-acting single-rod tie-rod cylinder delivering 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa). With a 40 mm bore and 785 mm stroke, it features a 16 mm diameter piston rod and an M12x1.25 rod thread, making it a capable mid-range actuator for linear motion tasks.
The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for contactless position sensing. Its adjustable air cushion (21 mm length) decelerates the piston smoothly at end-of-stroke, protecting the end caps during high-cycle operation.
| Model | Airtac SC40 Standard Cylinder SC40X785S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 785 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. |
| ×785 | 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 across a 785 mm span on packaging or assembly lines. The built-in magnet enables end-of-stroke confirmation via barrel-mounted sensors.
Operates sliding safety gates or material chutes with a long travel. The adjustable cushion prevents impact damage during rapid cycling.
Pushes cartons or totes off a main conveyor line. The 16 mm rod provides sufficient stiffness for straight-line pushing when guided externally.
This 40 mm bore cylinder suits applications needing moderate force over a long working distance. If your load requires more thrust, consider stepping up to the SC50 series, which provides 982 N of push force at 0.5 MPa. For a more compact design with lower force, the SC32 series offers 402 N at the same pressure.
At 785 mm stroke, the unsupported rod length is significant. Side loads or off-centre mounting can cause rod bending and premature bearing wear. For this stroke, use an external linear guide or a guided cylinder to absorb transverse forces and ensure reliable, long-life operation. For replacement, match bore, stroke, PT port thread, the built-in magnet (-S), and basic mounting configuration.
Quick checklist
At 0.5 MPa, it produces 628 N pushing and 528 N pulling. 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.
It is strongly recommended to use an external guide. The 16 mm rod is subject to bending under side load at this extended length. An external guide rail or rod support prevents premature seal and bearing failure.
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