Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50 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.
- BoreØ50 mm
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50
The AirTAC SAIJ50X290-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 290mm travel that can be dialed back by up to 50mm, yielding a precise 240-290mm usable window for commissioning without external stops. It delivers 982N of push thrust at 0.5MPa and features a SUS420J2 stainless steel rod for enhanced corrosion resistance.
This extruded aluminum profile cylinder omits the FB, CA, CB, and CR mounting options, retaining a focused set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces. The rear screw acts purely as a travel stop to set end positions and is not a lock, meaning it cannot hold a load without live air pressure. For position holding without continuous air, an external pilot-operated check valve or the related SAIL lock cylinder is required.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50 |
|---|---|
| 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.
Theoretical Output Force (Ø50mm)
| 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.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50
| 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.
Where the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50 Is Used
Product Changeover Stops
Quickly dial the travel back from 290mm to 240mm via the rear screw when switching to a shorter product format on the line.
End-Position Tuning
Fine-tune the retract end-of-stroke during machine commissioning without swapping out the entire cylinder or adding external stopper blocks.
Variable Push Assembly
Adjust the effective stroke on the fly to apply precise 982N push forces at varying depths for press-fitting operations.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50 the Right Cylinder?
Select this 50mm bore when an application requires 982N push force at 0.5MPa (or 1374N at 0.7MPa), making it a step up from the 40mm bore (628N) but lighter than the 63mm bore (1559N). Choose the SAIJ adjustable-stroke design over a fixed SAI when you need variable end-stops for product changeovers on a shared fixture. When matching ISO 15552 replacements, verify the 290mm stroke, 50mm adjustment, PT tapered port threads, and the SUS420J2 (A) rod material. Because the 290mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the rod.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX290-50 FAQ
At 0.5MPa operating pressure, this 50mm bore cylinder provides 982N of push thrust and 825N of pull thrust. At 0.7MPa, the push force increases to 1374N.
The rear adjuster screw allows you to shorten the effective stroke by up to 50mm, creating a 240-290mm travel window. The adjuster is a mechanical stop, not a lock, so it cannot hold the load without live air pressure.
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