The AirTAC Airtac SC40 Standard Cylinder SC40X20S is a genuine double-acting standard air cylinder with a Ø40mm bore and 20mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X20S is a double-acting single-rod pneumatic cylinder with a 40 mm bore and a short 20 mm stroke, delivering 628 N of push force at 0.5 MPa. Its 16 mm diameter piston rod and PT1/4 ports suit compact clamping, ejecting, or stopping tasks where a fast cycle and small footprint are needed.
This model includes the -S suffix for a built-in magnet, allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The body length A is 142 mm, giving a total extended length of approximately 162 mm, and the adjustable air cushion is 21 mm long to soften end-of-stroke impact.
| Model | Airtac SC40 Standard Cylinder SC40X20S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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. |
| ×20 | 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 20 mm stroke and 628 N push force at 0.5 MPa make it ideal for compact pneumatic clamps in CNC fixtures, welding jigs, and assembly stations where sensor confirmation of clamp position is required.
Use the SC40X20S as a part stopper on small conveyors or transfer lines. The built-in magnet lets a CMSG sensor verify the stop is retracted before the next pallet advances.
Fast-extend, fast-retract ejection of small components from a die or sorting gate. The 21 mm adjustable cushion protects the end cap during high-speed cycling.
For applications needing slightly more force, the 50 mm bore SC50 series provides 982 N at 0.5 MPa, while the 32 mm bore (402 N) saves space when the load is lighter. This 20 mm stroke is well within the 1200 mm maximum standard stroke for the 40 mm bore. When replacing an existing cylinder, match five points: 40 mm bore, 20 mm stroke, PT1/4 port thread, the built-in magnet (-S), and any mounting accessory—this basic model has no bracket, so confirm your existing mount style.
Quick checklist
At 0.5 MPa the push force is 628 N and pull force is 528 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
Yes. The -S suffix indicates a built-in magnet. You can clamp AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly onto the barrel to detect piston position without additional brackets.
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