Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40
The AirTAC SAIJ80X300-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 260-300 mm usable travel window by allowing you to dial back the 300 mm nominal stroke by up to 40 mm. In the 80 mm bore class, it generates 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it well-suited for heavier handling tasks.
This model uses a G3/8 port and a 25 mm carbon steel rod with an M20x1.5 thread. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet. The rear adjuster acts purely as a travel stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80X300-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SAIJ80X300-40 Is Used
Machine Changeover
Dial in the exact 260 to 300 mm end-stop during product size transitions on a packaging line without physically swapping the cylinder.
Assembly Positioning
Fine-tune the retract end position during initial commissioning to perfectly mate parts under the 2513 N push force available at 0.5 MPa.
Material Handling
Handle heavier workpieces on automated conveyors where the 80 mm bore force class is required and minor stroke adjustments optimize the transfer arc.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-40 the Right Cylinder?
Choose this 80 mm bore adjustable cylinder when your assembly requires fine end-position tuning during commissioning or product changeover without swapping out the entire body or adding external stops. If your application demands less force, stepping down to a 63 mm bore yields 1559 N of push force at 0.5 MPa. Because the 300 mm stroke is relatively long, the 25 mm rod and M20x1.5 thread provide robust support, but an external guide is still recommended to prevent excessive side-loading on the piston.
For load-holding without continuous live air, note that the rear adjuster and air cushions function only as travel stops, not as a lock. You would need to look at the SAIL or BSAI series for pneumatic locking mechanisms. This SAIJ variant uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. It is dimensionally interchangeable per ISO 15552 mounting-interface dimensions and uses PT tapered port threads.
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 SAIJ80X300-40 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 pressure of 1.0 MPa, it delivers a maximum push force of 4523 N.
The rear adjuster screw allows you to shorten the effective travel from the 300 mm nominal stroke by up to 40 mm, creating a 260-300 mm usable window. It acts as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
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