Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30
The AirTAC SAIJ125X260-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 230-260 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning tasks with precision. The extruded aluminum barrel includes dual sensor grooves, and the piston rod uses SUS420J2 stainless steel (code A) for enhanced corrosion resistance.
This model uses PT tapered port threads (G1/2) and offers variable air cushions at both ends to manage impact deceleration. The rear adjuster acts purely as a mechanical stop to dial in the exact end position during commissioning; it is not a lock and will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 260 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 SAIJ125AX260-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×260 | 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 SAIJ125AX260-30 Is Used
Product Changeovers
Dial in the 230-260 mm travel window during machine setup to accommodate different product lengths without swapping cylinders.
Heavy Diverter Stops
Use the 6136 N push force to halt large pallets, fine-tuning the stop position by up to 30 mm at commissioning.
Press Assembly Tuning
Adjust the end-stop to set precise pressing depths on the fly, ensuring accurate assembly without external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-30 the Right Cylinder?
Choose this 125 mm bore when you need high thrust (6136 N at 0.5 MPa) and the ability to fine-tune the retract end-position without adding external stoppers. If your application requires less force, stepping down to an 80 mm bore yields 2513 N, while a 160 mm bore provides 10053 N for heavier loads. The adjustable stroke is ideal for product changeovers on a line where exact end-of-stroke positions vary slightly.
Because the stroke is 260 mm (over the 300 mm threshold), ensure you provide an external guide to support the load and prevent excessive side-loading on the SUS420J2 rod. For load-holding without continuous air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead of relying on the rear stopper. To replace an ISO 15552 cylinder, match the 125 mm bore, 260 mm stroke, 30 mm adjustment, G1/2 PT port, and the required mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
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 SAIJ125AX260-30 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 1251 kgf at its maximum 1.0 MPa pressure.
The rear adjuster screw lets you mechanically shorten the nominal 260 mm stroke by up to 30 mm, creating a usable travel window of 230-260 mm. This stopper only sets the end position; it does not lock or hold the load without continuous air pressure.
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