The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 225mm 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 SAIJ50X225-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982N of push force at 0.5 MPa and features a 50mm adjustment range, creating a usable travel window of 175-225mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting.
This SKU is built with an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and includes a magnet (-S) for position detection. It operates at speeds of 30-800mm/s and uses PT tapered port threads. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 225 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. |
| ×225 | 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 stroke from 175 to 225mm during format changes on a packaging line, avoiding the need to physically swap cylinders for different package sizes.
Fine-tune the retract end-stop during machine commissioning to achieve exact positioning without machining external stop blocks.
Vary the ejection distance on an assembly station to accommodate parts with slightly different heights while maintaining 982N of pushing force.
Select this 50mm bore when an application requires 982N push force at 0.5 MPa but needs on-the-fly end-position tuning across a 175-225mm window. If you need less force, step down to a 40mm bore (628N push); for heavier loads, step up to a 63mm bore (1559N push). Choose this adjustable SAIJ over a fixed SAI when machine setups involve frequent product changeovers. Because the nominal stroke is 225mm, ensure adequate external guiding to prevent excessive rod side-loading.
To match this ISO 15552 dimensionally interchangeable cylinder, specify: 50mm bore, 225mm stroke, 50mm adjustment, PT port threads, SUS420J2 rod, and a -S magnet. The -S magnet works with AirTAC CMSE reed switches and DMSE electronic solid-state sensors. For applications requiring true load-holding without live air, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead, as the SAIJ adjuster is only a stop.
Quick checklist
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
The rear adjuster allows you to shorten the 225mm nominal stroke by up to 50mm, providing an effective travel window of 175-225mm. It functions as a mechanical stop and does not lock the load without continuous air pressure.
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