The AirTAC Airtac SC40 Standard Cylinder SC40X635S 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 SC40X635S is a double-acting pneumatic cylinder with a 40 mm bore and a 635 mm stroke, delivering a push force of 628 N at 0.5 MPa (up to 1130 N at 0.9 MPa). The piston rod measures 16 mm in diameter with an M12x1.25 knuckle thread, and the cylinder body length (A) is 142 mm, making the total extended length approximately 777 mm.
This model features a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for contactless position sensing. The standard TPU seals provide an operating temperature range of -20 to +70 °C, and the PT1/4 port threads ensure straightforward pneumatic connections.
| Model | Airtac SC40 Standard Cylinder SC40X635S |
|---|---|
| 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 635 mm stroke and sensor feedback make this cylinder suitable for actuating a stop gate on a conveyor line, confirming the gate position at both ends of travel.
With 628 N of push force at standard line pressure, it can reliably shuttle medium-weight components between two stations on a linear transfer system.
The long 635 mm stroke and magnetic piston sensing are ideal for a diverter chute in a sorting system, ensuring the chute is fully extended or retracted before product flow resumes.
Choose the SC40X635S when your application needs a 40 mm bore with sensor feedback along a 635 mm stroke. If you require higher force, stepping up to the 50 mm bore provides 982 N at 0.5 MPa. For strokes of this length, ensure the rod is not subjected to significant side loading; an external linear guide or a guided cylinder is recommended to prevent rod bending and premature bearing wear.
For a direct replacement, match the bore, stroke, PT port thread, the built-in magnet (-S), and the basic mounting configuration. The SC is a tie-rod cylinder with a shorter body than ISO 15552 profiles, so dimensional interchangeability is limited to another AirTAC SC of the same specifications.
Quick checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. The theoretical maximum force at 1.0 MPa is 128 kgf.
Yes, the -S suffix indicates a built-in magnet on the piston. This allows you to mount AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly on the cylinder barrel to detect piston position without any additional brackets.
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