The AirTAC Airtac SC40 Standard Cylinder SC40X635SN is a genuine double-acting standard air cylinder with a Ø40mm bore and 635mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X635SN is a double-acting single-rod pneumatic cylinder with a 40 mm bore and a 635 mm stroke, equipped with a built-in magnet (-S) and nitrile rubber seals (-N). Operating on filtered air at 0.15–1.0 MPa, it produces a theoretical push force of 628 N at 0.5 MPa and 1130 N at the maximum operating pressure of 0.9 MPa, driven by a 16 mm diameter piston rod.
This model's 635 mm stroke is within the 1200 mm maximum standard stroke for the 40 mm bore, making it a standard-order configuration. The cylinder body length A is 142 mm, giving a total extended length of approximately 777 mm. Its PT1/4 ports and M12x1.25 rod thread are standard for this bore size, and the adjustable air cushion at each end provides a 21 mm deceleration zone to manage end-of-stroke impact.
| Model | Airtac SC40 Standard Cylinder SC40X635SN |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 635 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. |
| ×635 | 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 628 N push force at 0.5 MPa is ideal for actuating stops or gates on light-to-medium-duty conveyor lines, with the 635 mm stroke providing ample reach across wide belt sections.
Used in pick-and-place or linear transfer mechanisms where the built-in magnet enables precise end-of-stroke sensing via reed or solid-state switches for reliable automation sequencing.
Delivers consistent force for pressing, clamping, or sealing operations in packaging machinery, with the NBR seals offering good compatibility with standard industrial environments.
For applications requiring slightly more force, stepping up to the SC50 series provides 982 N of push at 0.5 MPa. If a lower force profile is acceptable, the SC32 offers 402 N at the same pressure. This 635 mm stroke model is a standard length, but ensure the 16 mm rod is adequately supported against side loads; for strokes exceeding 300 mm, consider an external guide or a guided cylinder if the load is not perfectly axial to prevent rod bending.
To replace an existing unit, match five key points: 40 mm bore, 635 mm stroke, PT1/4 port thread, the built-in magnet for sensors (CMSG/DMSG/EMSG), and the basic mounting configuration. This is a tie-rod cylinder, not an ISO 15552 profile, so dimensional interchangeability is limited to other AirTAC SC tie-rod cylinders with the same specifications.
Quick checklist
The theoretical push force is 628 N at 0.5 MPa and 1130 N at the maximum operating pressure of 0.9 MPa. The pull force on the retract stroke is 528 N at 0.5 MPa, accounting for the 16 mm rod area.
Yes. The -S suffix in the model code indicates a built-in magnet is installed in the piston. This allows you to clamp compatible CMSG, DMSG, or EMSG series reed or solid-state sensors directly onto the cylinder barrel to detect piston position.
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