Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-30S
The AirTAC SAIJ125X350-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel provides sensor grooves on both sides for flexible switch mounting.
With a nominal stroke of 350mm and a 30mm adjustment range, this model provides a usable travel window of 320 to 350mm. This allows precise end-position tuning during commissioning without adding external stops. Operating at speeds of 30-500mm/s, it uses a G1/2 port and includes variable air cushions at both ends to manage deceleration. The rear adjuster acts as a travel stop, not a lock, so live air is required to maintain the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125AX350-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125AX350-30S Is Used
Machine Setup Changeover
Fine-tune the 320-350mm travel window during product size changeovers to set precise retraction points without replacing the entire actuator.
Variable End-Stop Diverter
Adjust the rear stopper on the fly to alter the stroke length for sorting different package sizes on a high-thrust conveyor routing system.
Heavy Press Positioning
Leverage the 6136N push force at 0.5 MPa to position heavy materials, using the 30mm adjuster to dial in the exact clamping distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-30S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (delivering 2513N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore (10053N) would be excessive. The adjustable 320-350mm travel window is ideal for product changeovers on a packaging line, allowing you to dial in the exact end-stop without swapping the cylinder. Because the stroke is 350mm, an external guide is recommended to support the rod and prevent excessive side-loading on the front seal.
This SAIJ configuration uses PT tapered port threads and supports a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It is dimensionally interchangeable per ISO 15552. For applications requiring the load to be held mechanically without continuous air pressure, a standard SAIJ is insufficient; consider the SAIL (air-released lock) or BSAI (clamp-lock) variants instead.
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 SAIJ125AX350-30S FAQ
The rear adjuster allows you to shorten the effective stroke by up to 30mm, creating a usable travel window of 320 to 350mm. This lets you fine-tune the retraction end position during commissioning without adding external mechanical stops.
At 0.5 MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
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