The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX135-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 135mm 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 SAIJ50X135-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 105-135 mm without swapping hardware. Delivering 982 N of push force at 0.5 MPa, it is dimensionally interchangeable per ISO 15552 standards.
This variant utilizes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit ships without a magnet, so external mechanical switches are required for position sensing.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX135-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 135 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. |
| ×135 | 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 end-stop during product size changes without physically swapping cylinders or adding external stopper blocks to the fixture.
Fine-tune the retract stroke within the 105-135 mm window during commissioning to perfect the seating pressure of parts.
Adjust the travel limit on automated assembly lines to accommodate multiple product variants running on the same conveyor.
Choose this 50 mm bore when an application demands 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore that provides 628 N. The 30 mm rear adjuster is ideal for machine changeover, letting you dial in the exact end-position at commissioning rather than machining external stops. For strokes of 135 mm, side-loading is minimal, but always guide the load if pushing off-center.
Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air. If your setup requires true fail-safe load holding, select the SAIL (air-released lock) or BSAI (clamp-lock) series instead. To match this ISO 15552 replacement: 50 mm bore, 135 mm stroke, 30 mm adjustment, PT port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, no magnet.
Quick checklist
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can reach up to 200 kgf at its maximum 1.0 MPa pressure rating.
The rear adjuster screw lets you shorten the nominal 135 mm stroke by up to 30 mm, creating a usable travel window of 105-135 mm. This stopper only sets the end position; it does not lock the load without live air pressure.
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