Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 300mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10
The AirTAC SAIJ125X300-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 6136N of pull force at 0.5 MPa and provides a usable travel window of 290-300mm, letting you dial in the exact retract position during commissioning. The rod is constructed from SUS420J2 stainless steel for enhanced corrosion resistance.
This model uses PT tapered port threads and operates at speeds of 30-500mm/s. The external rear stopper acts solely as a travel end deceleration device, meaning it cannot hold a load without live air pressure. For secure load-holding, an external rod lock or related SAIL series cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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, 40 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.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX300-10 Is Used
Machine Changeover
Dial in the 290-300mm retract stop during product size transitions to set precise end positions without swapping cylinders.
Assembly Fixtures
Use the 6136N pull force to securely clamp heavy components while fine-tuning the final clamping position by up to 10mm.
Material Forming
Adjust the rear stopper to compensate for material thickness variations, ensuring consistent press-back depth on every cycle.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX300-10 the Right Cylinder?
Choose this 125mm bore cylinder when an 80mm bore (yielding 2268N pull at 0.5MPa) lacks the power to move your load, but a 160mm bore (9425N pull) would be excessive. The 10mm adjustable stroke is ideal for fine-tuning end positions during machine changeover without adding external stops. If you need to hold a load mechanically without air pressure, step up to the SAIL or BSAI locking series.
With a 300mm stroke, the 32mm diameter rod is subject to leverage forces. Long unsupported strokes require an external guide to prevent side-load damage. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mountings.
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 SAIJ125 Adjustable Cylinder SAIJ125AX300-10 FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder generates 6136N of pull force and 1559N of push force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the nominal 300mm stroke by up to 10mm, creating a 290-300mm usable travel window. This stopper only sets the deceleration end point and does not lock the load without live air pressure.
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Standard models usually ship in 3-4 days.
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