Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-75 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 SAIJ80X325-75
The AirTAC SAIJ80X325-75 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa, utilizing a G3/8 port and a 25mm carbon steel rod. The integrated stopper screw allows you to dial back the 325mm nominal stroke, providing a usable travel window of 250-325mm to perfectly tune end positions during commissioning.
This extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. It uses a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 325mm stroke is relatively long, the 25mm rod diameter handles substantial loads, but an external guide is recommended to prevent excessive side-loading on the piston.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-75 |
|---|---|
| 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 SAIJ80X325-75
| 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 SAIJ80X325-75 Is Used
Product Changeover
Quickly fine-tune the 250-325mm retract window during production line format changes without replacing the cylinder or bolting on external stops.
Variable Diverter Stroke
Adjust the stroke length on a sorting diverter to accommodate different package sizes on the fly, ensuring precise routing without mechanical rebuilds.
Machine Setup Calibration
Dial in the exact end-of-stroke position during machine commissioning, using the 75mm adjustment range to compensate for mechanical tolerances.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X325-75 the Right Cylinder?
Select this 80mm bore when an application requires higher thrust than a 63mm cylinder (which provides 1559N push at 0.5 MPa), but without stepping up to the larger 100mm frame (3927N). The SAIJ80X325-75 is chosen over a fixed-stroke SAI when a machine handles varying product sizes, allowing operators to change the retract end-stop on the fly without swapping cylinders or adding external stops. The PT tapered port threads ensure a tight pneumatic seal.
When matching this for an ISO 15552 replacement, verify the 325mm stroke, 75mm adjustment range, G3/8 port, and required mounting bracket. Note that the rear adjuster acts only as a travel stop and the air cushions handle deceleration; neither will hold a load without live air pressure. For true load-holding, consider an AirTAC SAIL or BSAI 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 SAIJ80X325-75 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides a push force of 2513N and a pull force of 2268N. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from its 325mm nominal length down to 250mm. This provides a 250-325mm usable travel window for fine-tuning the retract end position without changing the cylinder.
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