The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 185mm 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 SAIJ50X185-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 155-185 mm usable travel window. Delivering 982 N of push thrust at 0.5 MPa, it handles mid-range actuation with precision. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This unit uses a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and features PT tapered port threads. The rear adjuster acts as a mechanical stop to fine-tune the end position at commissioning without swapping the cylinder. It supports standard SAIJ mounting options including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX185-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 185 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. |
| ×185 | 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 155-185 mm travel window during product size changes to set new retract stops without adding external physical stops.
Leverage the 982 N thrust and fine-tune the end position to compensate for mechanical wear or slight part variations on the line.
Adjust the retract distance on the fly to handle varying package sizes without changing out the entire actuator assembly.
Choose this 50 mm bore when your application requires around 982 N push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). An adjustable stroke is ideal for machine setups requiring variable end stops during product changeovers, avoiding the need to maintain inventory of multiple fixed-stroke SAI cylinders.
For strokes of 185 mm, the 20 mm rod diameter and M16x1.5 thread handle moderate side loads, though long unsupported travel still requires an external guide. This SKU uses a PT port thread type. Note that the rear adjuster and air cushions only decelerate the travel end; they do not hold the load without live air. For position holding without pressure, use a SAIL or BSAI cylinder. This profile cylinder is dimensionally interchangeable per ISO 15552.
Quick checklist
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push thrust and 825 N of pull thrust. At the maximum 1.0 MPa pressure, it delivers up to 200 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 185 mm stroke by up to 30 mm, creating a 155-185 mm travel window. It sets the end position but does not lock or hold the load without live air pressure.
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