The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX75-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 75mm 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 SAIJ50X75-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. Because the 75 mm adjustment code matches the nominal stroke, it yields a highly versatile 0-75 mm usable travel window, letting you set the exact retract end-position anywhere up to the full 75 mm. In the 50 mm bore class, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa.
This unit features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel provides sensor grooves on both sides, and the PT tapered port threads ensure a tight pneumatic seal.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX75-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 75 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. |
| ×75 | 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 exact retract distance from 0 to 75 mm during product size changeovers, eliminating the need to physically swap out cylinders for different part lengths.
Use the rear adjuster to set a precise end-of-stroke stop for machining or clamping tasks where the target position varies slightly between workpieces.
Control diverter arms on a conveyor line by tuning the stroke window on the fly, adapting to different package sizes without altering the pneumatic circuit.
Choose this 50 mm bore when an application requires moderate force (982 N push at 0.5 MPa) but highly variable end-stops; if you need less force, step down to a 40 mm bore (628 N push), or step up to a 63 mm bore (1559 N push) for heavier loads. An adjustable stroke is ideal for product changeovers on a line, allowing you to fine-tune the retract position at commissioning without swapping the cylinder or adding external stops. Remember that the rear adjuster acts only as a travel stop, not a lock; the SAIJ cannot hold a load without live air, so consider an AirTAC SAIL or BSAI cylinder if true load-holding is required. For an exact ISO 15552 dimensional replacement, match the 50 mm bore, 75 mm stroke, PT port, and -S magnet, noting that SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
Quick checklist
The rear adjuster screw acts as a mechanical stop that shortens the retract stroke. Since the 75 mm adjustment range equals the nominal stroke, you can trim the effective travel anywhere within a 0-75 mm window. The standard air cushion decelerates the piston, but the adjuster itself does not lock or hold the load without continuous air pressure.
At a standard operating pressure of 0.5 MPa, the SAIJ50X75-75-S generates 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
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