Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75S
The AirTAC SAIJ80X240-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 2513N of push force at 0.5 MPa and features a 240mm nominal stroke that can be fine-tuned down by up to 75mm, yielding a highly flexible 165-240mm usable travel window. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic switches for precise position detection.
This bore size utilizes a 25mm carbon steel rod with an M20x1.5 thread, paired with G3/8 PT ports and 36mm variable air cushions at both ends. The generous 75mm adjustment range allows operators to dial in the retract end-position during commissioning or product changeovers without adding external stops. The rear screw acts purely as a travel stop for deceleration, not a load-holding lock, operating effectively at speeds between 30-800mm/s.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 240 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 SAIJ80X240-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SAIJ80X240-75S Is Used
Product Changeover
Dial in the 165-240mm travel window during line changeovers to accommodate different package lengths without physically replacing the actuator.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to achieve exact positioning, utilizing the 36mm air cushion and rear stopper for controlled deceleration.
Variable Stops
Adjust the end-stop on the fly for sorting or diverting applications where the actuator contact point must shift based on product dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75S the Right Cylinder?
Select this 80mm bore cylinder when an application requires substantial force (2513N push at 0.5 MPa) alongside significant end-position variability. If your setup needs less force, stepping down to a 63mm bore yields 1559N; if you require more, the 100mm bore provides 3927N. The 75mm adjustment window is ideal for machines processing varying product sizes, allowing rapid changeovers without swapping the cylinder. Because the nominal stroke is 240mm, standard external guiding is recommended to manage side loads.
When specifying an ISO 15552 replacement, match the 80mm bore, 240mm stroke, 75mm adjustment, G3/8 PT ports, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR. For applications that must hold a load securely without live air pressure, a plain SAIJ is insufficient; consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock.
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 SAIJ80X240-75S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 513 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 75mm from the 240mm nominal length, creating a 165-240mm travel window. It functions as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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