Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100
The AirTAC SAIJ125X180-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 180 mm stroke that can be dialed back by up to 100 mm, yielding a versatile 80-180 mm usable travel window for precise end-position tuning during commissioning. Belonging to the 125 mm bore class, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop to set deceleration limits and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125AX180-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125AX180-100 Is Used
Product Changeover
Dial the stroke back from 180 mm to 80 mm during production line changeovers to accommodate different package sizes without mechanical rebuilds.
End-Stop Calibration
Fine-tune the retract end position at machine commissioning to dial in exact contact forces, utilizing the 100 mm adjustment range to perfect the setup.
Heavy Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy jigs into place, relying on the rear stopper to set the final deceleration point accurately.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires substantial thrust—6136 N push at 0.5 MPa—combined with on-the-fly stroke adjustments. If you need less force, stepping down to an 80 mm bore yields 2513 N push at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. Choose this adjustable-stroke SAIJ model over a fixed SAI when you need a variable end-stop to accommodate product changeovers without swapping the entire cylinder or adding external stops.
Because the stroke is 180 mm, an external guide rail is recommended to manage side loads if the rod is subjected to off-center forces. To match this exact configuration when replacing an ISO 15552 cylinder, specify the 125 mm bore, 180 mm nominal stroke, 100 mm adjustment range, PT port threads, and the SUS420J2 rod material. Note that for load-holding requirements without continuous air pressure, this cylinder is not a lock; you should consider the SAIL or BSAI series 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 SAIJ125AX180-100 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw lets you shorten the effective travel from its 180 mm nominal stroke down to as little as 80 mm, creating an 80-180 mm usable window. The adjuster acts as a mechanical stop to set the travel end and does not lock the load in place without live air.
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