Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50S 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 SAIJ125AX260-50S
The AirTAC SAIJ125X260-50-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 210 to 260 mm, allowing you to dial back the nominal 260 mm stroke by up to 50 mm during commissioning. Belonging to the 125 mm bore class, it delivers 6136 N of push force at 0.5 MPa and accommodates operating speeds of 30-500 mm/s.
This unit integrates a magnet for position sensing with AirTAC CMSE reed and DMSE electronic switches, fitting neatly into the standard sensor grooves on both sides of the extruded aluminum barrel. The piston rod utilizes SUS420J2 stainless steel for enhanced corrosion resistance, and the fluid port features a PT tapered thread. The rear adjuster functions purely as a mechanical stop to set the retract end position and deceleration, meaning it will not hold a load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50S |
|---|---|
| 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 SAIJ125AX260-50S
| 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 SAIJ125AX260-50S Is Used
Product Changeover
Dial in the 210 to 260 mm travel window rapidly when switching product sizes on a packaging line without changing the cylinder.
Machine Setup
Fine-tune the retract end-position during initial commissioning to perfect a 6136 N press fit without adding external stops.
Variable End Stops
Use the rear adjuster to set precise deceleration points for heavy actuators operating at 30-500 mm/s.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-50S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires 6136 N of thrust at 0.5 MPa and demands on-the-fly end-position tuning without swapping out physical components. If your process requires less force, stepping down to an 80 mm bore yields 2513 N; if you need significantly more push, a 160 mm bore provides 10053 N. The 50 mm adjustment range is ideal for product changeovers on a line, replacing the need to bolt on external stops. For true load-holding without live air pressure, this cylinder is not a lock; you should look at the SAIL or BSAI series, or use an external rod lock.
To match this exact configuration in an ISO 15552 interchangeable footprint, specify the 125 mm bore, 260 mm stroke, 50 mm adjustment range, PT port thread, and the -S magnet option. The mounting hardware is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the 260 mm stroke is relatively long, ensure you provide an external guide to support the rod and prevent excessive side-loading on the equipment.
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 SAIJ125AX260-50S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the 260 mm nominal stroke by up to 50 mm, providing a usable travel window of 210 to 260 mm. It sets the end position and deceleration but does not lock or hold the load without live air pressure.
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