
The AirTAC SAIJ200 Adjustable Cylinder SAIJ200X45-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 45mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
The AirTAC SAIJ200X45-30-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 45 mm nominal stroke that can be fine-tuned down by up to 30 mm, providing a usable travel window of 15 to 45 mm.
Unlike a fixed-stroke SAI, the external rear stopper lets you dial in the precise travel limit during commissioning without swapping hardware. This unit includes a magnet for CMSE reed and DMSE electronic sensors, and uses a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and the carbon steel rod handles high side loads, though external guides are recommended for unsupported masses.
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200X45-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 45 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max stroke | Up to 1500 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 | 15080 N | 15080 N |
| 0.7 MPa | 21111 N | — |
| Max (@1.0 MPa) | 3075 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. 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. |
|---|---|
| 200 | Bore size in mm. |
| ×45 | 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.
Quickly dial in the rear stopper to accommodate varying material thicknesses on a production line without changing the cylinder.
Secures large workpieces using the 200 mm bore power, relying on the PT port and CMSE/DMSE sensor compatibility for integrated control.
The adjustable stroke is selected over a fixed cylinder when machine setups require variable end-stops or product changeovers without adding external stops.
Because the stroke is 45 mm, side-load risks are minimal, but the 40 mm carbon steel rod provides excellent rigidity for heavy impacts. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. This SAIJ model accepts the reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Quick checklist
The rear adjuster screw allows you to shorten the 45 mm nominal stroke by up to 30 mm, creating a usable travel window of 15 to 45 mm. The adjuster is a mechanical stop that sets the end position, but it does not lock the load without continuous air pressure.
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