The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX180-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 180mm 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 SAIJ50X180-100 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 180 mm stroke that can be dialed back by up to 100 mm, yielding a highly flexible 80-180 mm usable travel window. This broad adjustment range is ideal for machines processing multiple product sizes, allowing you to reposition the end stop during changeovers without swapping hardware. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa.
This unit is configured with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. If position detection is later required, you can add a magnet and install AirTAC CMSE reed or DMSE electronic solid-state switches. The rear screw acts strictly as a travel stop to fine-tune deceleration, not as a load lock.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX180-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 180 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. |
| ×180 | 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.
Dial in the 80-180 mm travel window on packaging lines to accommodate varying carton depths without replacing the cylinder or adding external stops.
Fine-tune the exact end-of-stroke contact point during machine commissioning, leveraging the 100 mm trim range to find the optimal operating spot.
Use the rear adjuster screw to set precise retraction limits on automated assembly stations, ensuring delicate parts are not crushed by the 982 N force.
Choose this 50 mm bore when an application requires around 982 N of thrust at 0.5 MPa, stepping up from a 40 mm bore that provides 628 N, or down from a 63 mm bore yielding 1559 N. The 100 mm adjustment window is exceptionally wide, making this SKU superior for prototyping cells or custom machinery where the exact end-of-stroke position is unknown at commissioning. Because the 180 mm stroke is under 300 mm, side-load stress on the 20 mm rod is manageable without external guides, though unsupported loads should always be kept in check.
For an exact ISO 15552 replacement, match the 50 mm bore, 180 mm stroke, PT port threads, and SUS420J2 rod material. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Remember that the adjuster only sets the travel end; to hold a load securely without live air pressure, use an external rod lock or select an AirTAC SAIL or BSAI cylinder.
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 adjuster screw allows you to shorten the effective stroke from its 180 mm nominal length down to as little as 80 mm. This stopper physically limits the retraction travel, but it does not lock the load in place without continuous air pressure.
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