Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-30
The AirTAC SAIJ125X230-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 230 mm stroke that can be dialed back by up to 30 mm, giving you a usable travel window of 200 to 230 mm. This allows for fine end-position tuning at commissioning without swapping the cylinder or bolting on external stops.
Belonging to the 125 mm bore class, it delivers 6136 N of pull force at 0.5 MPa and up to 11045 N at 0.9 MPa. The piston rod is crafted from SUS420J2 stainless steel (code A) for improved corrosion resistance, and the body uses an extruded aluminum profile with sensor grooves on both sides. The rear adjuster acts purely as a mechanical stop to set the travel end; it does not hold the load without live air.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125AX230-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125AX230-30 Is Used
Machine Changeover
Dial in the 200-230 mm stroke window during product size changes on a packaging line without replacing the cylinder.
Variable End-Stop Positioning
Fine-tune the retract end-position during commissioning to perfect the seating of heavy components.
High-Force Clamping
Utilize the 11045 N push force at 0.9 MPa to secure large workpieces while adjusting the clamping depth by up to 30 mm.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-30 the Right Cylinder?
Choose this 125 mm bore when your application requires high thrust (6136 N pull at 0.5 MPa) and a variable end-stop. If you need less force, stepping down to an 80 mm bore yields 2268 N pull at 0.5 MPa, whereas a 160 mm bore provides 9425 N pull for heavier loads. The SAIJ is selected over a fixed-stroke SAI when machine setup or product changeover requires adjustable travel limits.
Because the 230 mm stroke is below the 1500 mm maximum, it is standard length, but any stroke of 300 mm or more requires an external guide to prevent side-load damage. For load-holding without live pressure, this cylinder is insufficient; you must use a SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder, or install an external rod lock. This model uses PT tapered ports and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ125AX230-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, the push force increases to 11045 N.
A rear mechanical screw acts as a stopper, allowing you to shorten the effective travel from the 230 mm nominal stroke down to 200 mm. This adjuster only sets the travel end and does not lock or hold the load without continuous air pressure.
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