Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40
The AirTAC SAIJ50X225-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the end position without adding external stops. By dialing back the nominal 225 mm stroke by up to 40 mm, this model provides a usable travel window of 185-225 mm. It delivers a robust 982 N push force and 825 N pull force at 0.5 MPa, making it well-suited for moderate-duty handling tasks.
Built with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance, this unit uses PT tapered port threads (G1/4) and features variable air cushions at both ends to decelerate moving loads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, and the rear adjuster acts strictly as a travel stop, meaning it will not hold the load safely without continuous live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 225 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 SAIJ50AX225-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | 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 SAIJ50AX225-40 Is Used
Variable End-Stop Tuning
Dial in the exact 185-225 mm retract distance during machine commissioning to accommodate new fixture heights without disassembling the pneumatic setup.
Product Size Changeover
Quickly adjust the travel end-position on packaging lines processing different carton lengths, ensuring precise spacing without replacing the cylinder.
Fixture Positioning
Fine-tune the clamping distance on machining fixtures where the raw material thickness varies slightly, preventing over-travel and crush damage.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40 the Right Cylinder?
Choose this 50 mm bore when a 40 mm bore (628 N push at 0.5 MPa) lacks the necessary thrust, but a 63 mm bore (1559 N push at 0.5 MPa) would be physical overkill for your machine layout. The adjustable 185-225 mm travel window is ideal for production lines running mixed product sizes, allowing rapid changeover and precise end-position tuning at commissioning without physically swapping out a fixed-stroke SAI cylinder.
Because the nominal stroke is 225 mm, the 20 mm rod and M16x1.5 rod thread will still experience some leverage forces; always use an external guide rail to prevent side-load damage. If your application requires the cylinder to hold its position during an air pressure loss, the plain SAIJ adjuster cannot act as a lock—consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead. This model is dimensionally interchangeable per ISO 15552 footprint standards, utilizing PT tapered ports and a Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interface.
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 SAIJ50AX225-40 FAQ
At a 0.5 MPa operating pressure, the 50 mm bore provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 200 kgf of push force.
The rear adjuster screw allows you to shorten the 225 mm nominal stroke by up to 40 mm, creating a usable travel window of 185-225 mm. This stopper only sets the retract end-position and does not lock the load without live air pressure.
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