Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40
The AirTAC SAIJ80X125-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates an 85-125 mm usable travel window. Delivering 2513 N of push force at 0.5 MPa, it provides substantial thrust for mid-weight industrial handling. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
The 40 mm adjustment range allows operators to fine-tune the retract end position during commissioning or product changeover without swapping the cylinder. Equipped with a 25 mm carbon steel rod and M20x1.5 thread, it handles notable side loads, while the PT G3/8 port ensures high airflow for its 30-800 mm/s speed capability.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SAIJ80 Adjustable Cylinder SAIJ80X125-40 Is Used
End-Position Tuning
Dial in the exact retract distance within the 85-125 mm window during machine commissioning to perfect part ejection without adding external stopper blocks.
Product Changeover
Quickly adapt the cylinder's effective stroke on the fly when a conveyor line switches to a different package size, minimizing downtime between runs.
Mid-Force Forming
Leverage the 2513 N push force at 0.5 MPa for medium-duty pressing or holding tasks where the final position must be micro-adjusted to the millimeter.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-40 the Right Cylinder?
Select this 80 mm bore when a 50 mm bore (982 N at 0.5 MPa) is insufficient for your load, but a 100 mm bore (3927 N at 0.5 MPa) would be excessive. The SAIJ80X125-40 is chosen over a fixed-stroke SAI when a machine requires variable end-stops to accommodate multiple product sizes on a single line. It supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for true drop-prevention, consider an external pilot-operated check valve or a BSAI clamp-lock cylinder. To match this ISO 15552 footprint, specify an 80 mm bore, 125 mm stroke, 40 mm adjustment, PT G3/8 port, and no magnet.
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 SAIJ80 Adjustable Cylinder SAIJ80X125-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, the push force reaches 513 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm from the 125 mm nominal length, creating an 85-125 mm travel window. It functions as a mechanical stop for end-position tuning and does not lock the load without continuous air pressure.
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