The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50X700-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 700mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
The AirTAC SAIJ50X700-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear mechanical stopper for stroke refinement. It provides a 650 to 700 mm usable travel window, allowing you to dial back the 700 mm nominal stroke by up to 50 mm during commissioning. This bore delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a solid choice for mid-range actuation.
Because this unit carries the -S magnet option, it directly supports AirTAC CMSE reed and DMSE solid-state sensors housed within the dual-side sensor grooves of the extruded aluminum barrel. The 16 mm carbon steel piston rod and M16x1.5 thread provide a robust interface, though at 700 mm of travel, an external guide is recommended to manage side loads. The SAIJ mounting set omits FB, CA, CB, and CR brackets, focusing instead on Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50X700-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 700 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×700 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Adjust the 650-700 mm travel window on packaging lines when switching to different carton sizes without replacing the cylinder or adding external spacers.
Fine-tune the retract end-position during machine commissioning to achieve exact material feeding or pressing depths.
Leverage the 982 N push force at 0.5 MPa for moving heavier pallets or fixtures over the 700 mm travel distance on an assembly line.
Select this 50 mm bore cylinder when your application requires 982 N of push force at 0.5 MPa and the ability to fine-tune the end position without swapping hardware. If your process demands less force, the 40 mm bore provides 628 N; if you need more clamping power, stepping up to the 63 mm bore yields 1559 N. The adjustable rear stopper is ideal for product changeovers where the exact end-of-stroke varies slightly, removing the need to bolt on external stops.
For any stroke length of 700 mm, you must account for rod deflection and use an external guide to prevent excessive side loading on the rod seals. The rear adjuster acts solely as a travel stop to set deceleration and end position, not as a lock; it will not hold a load without live air. For true fail-safe load holding, consider the SAIL or BSAI series. When replacing an ISO 15552 cylinder, match the 50 mm bore, 700 mm stroke, 50 mm adjustment, PT port thread, and -S magnet requirement.
Quick checklist
At 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the 700 mm nominal stroke by up to 50 mm, creating a 650 to 700 mm usable travel window. It sets the end position but does not lock or hold the load without continuous air pressure.
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