The AirTAC Airtac SC40 Standard Cylinder SC40X420S 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 SC40X420S is a double-acting pneumatic cylinder with a 40 mm bore and 420 mm stroke, built in AirTAC's compact tie-rod SC series. At 0.5 MPa it generates 628 N extending thrust and 528 N on retract, making it a capable mid-range actuator for general automation.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to be clamped directly onto the barrel for non-contact position sensing. The 16 mm diameter piston rod features an M12x1.25 male thread, and the adjustable air cushion at each end provides a 21 mm deceleration zone to soften end-of-stroke impact.
| Model | Airtac SC40 Standard Cylinder SC40X420S |
|---|---|
| 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.
Actuates diverter gates or stops on conveyor lines. The 420 mm stroke provides ample travel for medium-width belt systems, with sensor feedback confirming gate position.
Delivers 628 N of clamping force at standard line pressure, ideal for holding workpieces in CNC fixtures or assembly jigs where magnetic piston sensing ensures the part is secured before machining.
Pushes cartons or products into cartoners or case packers. The adjustable cushion handles the inertia of the load at the end of the 420 mm stroke, while the magnet allows end-of-travel confirmation.
For applications needing more force, stepping up to the 50 mm bore SC50 series provides 982 N at 0.5 MPa, while the 32 mm bore offers a lighter 402 N option. With a 420 mm stroke, ensure the rod is not subjected to significant side loads; long unsupported strokes can cause rod bearing wear or bending. Use an external linear guide or a guided cylinder if side forces are present.
When replacing an existing cylinder, match five key points: 40 mm bore, 420 mm stroke, PT1/4 port thread, the built-in magnet (-S) for sensor compatibility, and the basic mounting configuration (no factory-fitted bracket).
Quick checklist
At the standard maximum operating pressure of 0.9 MPa, the cylinder produces 1130 N extending force. At a typical factory air pressure of 0.5 MPa, it provides 628 N (push) and 528 N (pull). The theoretical maximum force at 1.0 MPa is 128 kgf.
Yes. The '-S' suffix in the model code SC40X420S indicates a built-in magnet on the piston. This allows AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors to be mounted externally on the barrel to detect piston position without mechanical contact.
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