The AirTAC Airtac SC40 Standard Cylinder SC40X420 is a genuine double-acting standard air cylinder with a Ø40mm bore and 420mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X420 is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, combining a 40 mm bore with a 420 mm stroke. At a standard operating pressure of 0.5 MPa, it generates 628 N of push force and 528 N of pull force, making it suitable for medium-duty linear transfer and clamping tasks.
This model features a 16 mm diameter piston rod with an M12x1.25 male thread and PT1/4 ports. The body length A is 142 mm, resulting in a total extended length of approximately 562 mm. The integrated adjustable air cushion provides a 21 mm deceleration zone at each end, reducing impact noise and vibration without locking the piston position.
| Model | Airtac SC40 Standard Cylinder SC40X420 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 420 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. |
| ×420 | 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 420 mm stroke provides the reach needed to divert medium-weight cartons across a conveyor line, with the 628 N push force handling consistent transfer duties at standard shop air pressure.
Extends a glue applicator head with controlled speed. The 21 mm adjustable cushion at each end prevents vibration that could affect bead placement accuracy on assembly lines.
Used in palletizing cells to square up layers of goods. The double-acting control allows precise retraction and extension, while the tie-rod construction withstands repetitive cycling in dusty environments.
For applications requiring slightly higher force, consider stepping up to the 50 mm bore SC50 series, which delivers 982 N of push force at the same 0.5 MPa pressure. If space is a constraint and lower force is acceptable, the 32 mm bore SC32 series provides 402 N.
With a 420 mm stroke, the 16 mm rod is susceptible to bending under side loads. If the load is not guided externally, use an external linear guide or consider a guided cylinder to protect the rod bearing and seals from premature wear. When replacing this cylinder, match five key points: 40 mm bore, 420 mm stroke, PT1/4 port thread, basic mounting (no accessory bracket), and ensure the replacement has no built-in magnet unless you are adding sensors.
Quick checklist
At 0.5 MPa (5 bar), the cylinder produces 628 N pushing force and 528 N pulling force. 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.
No. The SC40X420 is a standard double-acting cylinder and will not hold position if air pressure is lost or the directional valve is centered. The adjustable air cushions only decelerate the piston at stroke ends. For load holding, you must add an external rod lock or a pilot-operated check valve.
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