Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100
The AirTAC SAIJ125X210-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that creates a usable travel window of 110 to 210 mm. Equipped with a SUS420J2 stainless steel rod, it delivers 6136 N of pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This model uses a PT tapered port thread and omits the FB, CA, CB, and CR mounting formats, offering the specific SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear adjuster acts purely as a travel stop for end-position tuning and does not function as a lock, meaning live air is required to hold the load in place.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAIJ125AX210-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAIJ125AX210-100 Is Used
Machine Changeover
Dial in the exact end-stop during product size transitions on a packaging line without adding external stopper blocks.
Press Positioning
Fine-tune the retraction point of a heavy-duty press within the 110 to 210 mm window during initial commissioning.
Variable End Stops
Adjust the effective travel rearward by up to 100 mm to accommodate varying material thicknesses in an assembly fixture.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-100 the Right Cylinder?
Select this 125 mm bore when a 100 mm adjustment window is needed for product changeovers without physically swapping the cylinder, providing a distinct advantage over a fixed-stroke SAI model. If your application requires less force, stepping down to an 80 mm bore yields 2268 N of pull at 0.5 MPa. Because the stroke is 210 mm, an external guide is recommended to manage side loads on the 32 mm rod.
For an exact ISO 15552 replacement match, verify the 125 mm bore, 210 mm stroke, 100 mm adjustment, PT port thread, and the required mounting accessory. Note that for load-holding without live air pressure, you must integrate an external rod lock or pilot-operated check valve, or switch to a SAIL or BSAI cylinder.
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 SAIJ125AX210-100 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 0.7 MPa, the push force increases to 8590 N.
The rear adjusting screw allows you to shorten the effective travel from the nominal 210 mm down to 110 mm. This stopper sets the retract end position but does not lock the load without continuous live air pressure.
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