The AirTAC Airtac SC40 Standard Cylinder SC40X300S is a genuine double-acting standard air cylinder with a Ø40mm bore and 300mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X300S is a double-acting pneumatic cylinder delivering 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa). Its 16 mm diameter piston rod and 21 mm adjustable air cushion provide smooth deceleration at each end of the 300 mm stroke, making it a reliable workhorse for medium-duty linear tasks.
This model includes 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 non-contact position sensing. The body length A is 142 mm, giving a total extended length of approximately 442 mm. Operating pressure is 0.15-1.0 MPa with filtered air, and the standard TPU seals suit temperatures from -20 to +70 °C.
| Model | Airtac SC40 Standard Cylinder SC40X300S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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. |
| ×300 | 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 300 mm stroke and built-in magnet allow precise end-of-stroke sensing to divert cartons on a conveyor line, operating reliably at common factory air pressures.
Delivers 628 N of clamping force at 0.5 MPa for holding workpieces during light machining or assembly, with sensor confirmation of the clamped position.
The clean double-acting motion and adjustable cushion smoothly extend a sampling probe 300 mm into a test chamber, with magnetic sensors verifying full insertion and retraction.
With 628 N of push force at 0.5 MPa, the SC40X300S sits between the smaller SC32 (402 N) and the larger SC50 (982 N). If your load is consistently above 500 N, stepping up to the 50 mm bore provides a comfortable margin. For this 300 mm stroke, ensure the rod is not subjected to significant side loading; if the application involves off-axis forces, pair the cylinder with an external linear guide or consider a guided cylinder to protect the rod bearing from bending stress.
When replacing an existing cylinder, match five key points: 40 mm bore, 300 mm stroke, PT1/4 port thread, the built-in magnet for sensor compatibility, and the basic (no bracket) mounting style. This tie-rod SC design is shorter than an ISO 15552 cylinder and is not dimensionally interchangeable with that standard.
Quick checklist
At 0.5 MPa, the cylinder pushes with 628 N and pulls with 528 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
Yes. The -S suffix in SC40X300S indicates a built-in magnet on the piston. This allows AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors to be clamped onto the tie-rod barrel for accurate, non-contact position feedback.
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