Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-50S
The AirTAC SAIJ50X240-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 982N push force at 0.5 MPa and allows you to dial back the 240mm nominal stroke by up to 50mm, creating a precise 190-240mm usable travel window for product changeovers. The extruded aluminum barrel includes sensor grooves on both sides, and this unit includes a magnet for position sensing.
This model uses a SUS420J2 stainless steel piston rod (material code A) for improved corrosion resistance and carries a PT tapered port thread. The rear adjuster acts purely as a mechanical stop to set the retract end position, meaning it does not hold the load without live air pressure. For load-holding without continuous pressure, you would need a related type like the SAIL or BSAI.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 240 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 SAIJ50AX240-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×240 | 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 SAIJ50AX240-50S Is Used
End-Position Fine-Tuning
Dial in the exact retract distance within the 190-240mm window during machine commissioning without installing external physical stops.
Product Size Changeover
Quickly adapt the cylinder travel on packaging lines when switching to a different product size by rotating the rear adjuster screw.
Variable Stroke Assembly
Set precise pressing or insertion depths for varying component heights on a single fixture using the 50mm adjustment range.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-50S the Right Cylinder?
Choose this 50mm bore cylinder when your application requires 982N of push force or 825N of pull force at 0.5 MPa. If your setup needs less force, stepping down to a 40mm bore provides 628N push force; if you need more clamping power, stepping up to a 63mm bore yields 1559N. The adjustable stroke is ideal for machine setups requiring fine end-position tuning without swapping cylinders or adding external stops. Since the stroke is 240mm, ensure proper guiding to prevent excessive side loads on the rod thread. As an ISO 15552 interchangeable cylinder, verify your replacement needs by matching the 50mm bore, 240mm stroke, 50mm adjustment, PT port, and -S magnet.
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 SAIJ50AX240-50S FAQ
At an operating pressure of 0.5 MPa, this 50mm bore cylinder provides a push force of 982N and a pull force of 825N. At the maximum pressure of 1.0 MPa, it can deliver up to 200 kgf.
The rear mechanical stopper allows you to shorten the effective stroke from its 240mm nominal length by up to 50mm, providing a usable travel window of 190-240mm. This adjuster is a travel stop, not a lock, so it cannot hold the load without live air pressure.
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