Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-75
The AirTAC SAIJ80X325-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3518N of push force at 0.7 MPa. It features a SUS420J2 stainless steel rod and PT tapered ports. By turning the rear screw, you can trim the effective travel back by up to 75 mm, creating a precise 250-325 mm usable stroke window for exact end-position tuning.
Because the nominal 325 mm stroke is relatively long, the 25 mm rod and M20x1.5 thread provide necessary rigidity, though an external guide is recommended to manage side loads. This adjustable design eliminates the need to swap cylinders during product changeovers. The mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA styles.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 325 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 SAIJ80AX325-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×325 | 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 SAIJ80AX325-75 Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 250-325 mm window during machine commissioning to accommodate different product lengths without changing hardware.
Product Changeover
Quickly adjust the stroke by up to 75 mm on a packaging line when switching to a new carton size, minimizing downtime and avoiding external stop modifications.
Long-Stroke Positioning
Leverage the 3518N push force to move heavy fixtures over a 325 mm distance while relying on the rear screw to fine-tune the final resting position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-75 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 2182N push at 0.7 MPa) but less bulk than a 100 mm option. The 75 mm adjustment range is specifically valuable for machine setups requiring variable end-stops, allowing operators to fine-tune the 250-325 mm travel window during commissioning without machining external stops. If your process demands load-holding without live air pressure, note that this rear adjuster acts only as a travel stop and not a lock; you would need an external rod lock or a SAIL pneumatic lock cylinder for those tasks.
For a direct ISO 15552 replacement match, ensure the 80 mm bore, 325 mm nominal stroke, 75 mm adjustment, PT port thread, and required mounting bracket are specified. As the 325 mm stroke exceeds 300 mm, incorporating an external guide rail is highly recommended to prevent excessive side-loading on the rod.
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 SAIJ80AX325-75 FAQ
At an operating pressure of 0.7 MPa, this 80 mm bore cylinder provides 3518N of push force and 2268N of pull force. It can reach a maximum push force of 4523N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the effective travel from the 325 mm nominal stroke. You can trim the stroke by up to 75 mm, providing an adjustable operating window between 250 mm and 325 mm.
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