The AirTAC Airtac SC Standard Cylinders SC40X550S is a genuine double-acting standard air cylinder with a Ø40mm bore and 550mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X550S is a double-acting tie-rod cylinder with a 40 mm bore and a long 550 mm stroke, delivering about 628 N of push force at 0.5 MPa and 879 N at 0.7 MPa. The built-in magnet (the S suffix) lets CMSG, DMSG or EMSG sensors clamp directly onto the barrel for end-of-stroke or mid-stroke position feedback.
The 16 mm rod runs on TPU seals rated from -20 to +70 C, with a 21 mm adjustable cushion at each end to soften deceleration over this long travel. Body length A is 142 mm, so the fully extended length is roughly 692 mm. Ports are PT1/4 and the rod thread is M12x1.25.
| Model | Airtac SC Standard Cylinders SC40X550S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 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. |
| ×550 | 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.
With 550 mm of travel and 628 N push at 0.5 MPa, this cylinder ejects cartons or totes from wide conveyor lanes, while the magnet and a CMSG sensor confirm the retract position each cycle.
The 879 N force at 0.7 MPa raises gates, flaps and diverters through a long vertical travel; the 21 mm adjustable cushion eases the piston into each end stop. Note the load will drop if air pressure is lost, so add a mechanical lock or pilot-operated check valve where holding is critical.
On custom fixtures the SC40X550S drives sliding clamps and tooling slides, with DMSG or EMSG sensors on the magnetised barrel signalling clamp and unclamp states to the PLC.
At 550 mm stroke this is a long-travel 40 mm cylinder: 628 N at 0.5 MPa. If your load needs more, step up to the SC50 bore (982 N at 0.5 MPa); if less, the SC32 (402 N at 0.5 MPa) saves space and air. Over this 550 mm of travel the slender 16 mm rod is exposed to bending under any side load, so support the load on an external guide or specify a guided cylinder rather than letting the rod carry lateral forces.
Replacing an existing unit? Match all five points: 40 mm bore, 550 mm stroke, PT1/4 port thread, mounting accessory, and the -S magnet. This SC is a tie-rod cylinder, not an ISO 15552 profile cylinder, so it is shorter and not dimensionally interchangeable with ISO 15552 models.
Quick checklist
At 0.5 MPa it pushes with about 628 N and pulls with about 528 N. At 0.7 MPa push force rises to roughly 879 N, and at the 0.9 MPa maximum operating pressure it reaches about 1130 N. Theoretical maximum force at 1.0 MPa is around 128 kgf.
It is a direct replacement for another AirTAC SC or tie-rod cylinder of the same 40 mm bore, 550 mm stroke, PT1/4 port, mounting accessory and -S magnet. It is not an ISO 15552 cylinder and is shorter, so it will not drop into an ISO 15552 envelope. At 550 mm of travel the 16 mm rod is prone to bending under side load, so carry lateral forces on an external guide or a guided cylinder.
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