The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 290mm 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 SAIJ50X290-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 290 mm travel back by up to 100 mm. This yields a usable 190-290 mm end-position window, allowing precise tuning at commissioning without bolting on external stops or swapping the barrel. The extruded aluminum body includes sensor grooves on both sides for flexible switch mounting.
Delivering 982 N of push force and 825 N of pull force at 0.5 MPa, this 50 mm bore unit uses a PT tapered port and a 20 mm carbon steel rod. The SUS420J2 stainless steel rod option (code A) is specified here for improved corrosion resistance. It carries the standard SAIJ mounting set of Basic, FA, LB, TC, FTC, TCM1 and TCM2, deliberately omitting FB, CA, CB and CR mounts.
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 290 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. |
| ×290 | 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 for varying package sizes on a packaging line, utilizing the full 100 mm adjustment window to switch profiles rapidly without changing hardware.
Fine-tune the retract end position during commissioning to perfect a pressing or clamping operation, avoiding the need to machine custom spacers.
Provide a mechanical dead-stop for an assembly fixture that handles multiple part lengths, using the rear adjuster to set the precise 190 to 290 mm travel limit.
Choose this 50 mm bore when your application requires around 982 N of push force at 0.5 MPa, stepping down from a 63 mm bore that provides 1559 N, or up from a 40 mm bore that yields 628 N. The 100 mm adjustment range is ideal for machinery requiring significant product-size changeovers, letting operators dial in the exact end-stop mechanically. The rear screw acts purely as a travel stop and does not hold the load without live air; for fail-safe load holding, consider the SAIL or BSAI series instead.
Because the 290 mm stroke is 300 mm or under, side loads remain manageable, but long unsupported strokes still benefit from an external guide to protect the 20 mm rod thread. To match this ISO 15552 interchangeable cylinder exactly, specify a 50 mm bore, 290 mm stroke, 100 mm adjuster, PT ports, the reduced mounting set, and no -S 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. At 0.7 MPa, the push force increases to 1374 N.
A rear screw stopper mechanically limits the piston travel, allowing you to shorten the effective stroke from 290 mm down to 190 mm. This creates a 100 mm adjustable window for setting exact end positions without replacing the cylinder.
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