Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 270mm 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
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75
The AirTAC SAIJ80X270-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 195 to 270 mm. Delivering 2513 N of push thrust at 0.5 MPa, it provides robust actuation for mid-to-large pneumatic setups. The extruded aluminum barrel includes sensor grooves on both sides, allowing direct mounting of position switches.
This SKU utilizes a SUS420J2 stainless steel piston rod for enhanced corrosion resistance and carries PT tapered port threads (G3/8) for secure pneumatic connections. The rear adjustment screw functions purely as a mechanical stop to fine-tune the end position at commissioning; it does not hold the load without live air pressure. For applications requiring position holding without continuous air, a SAIL or BSAI series cylinder is recommended.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAIJ80AX270-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SAIJ80AX270-75 Is Used
Product Changeover
Dial in the 195-270 mm travel window during format changes on packaging lines without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract stroke end during machine commissioning to compensate for mechanical tolerance stack-up across the fixture.
Adjustable Ejection
Vary the ejection distance on an assembly line to safely push different part sizes clear of the machine bed.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75 the Right Cylinder?
Choose this 80 mm bore when the 50 mm bore class (offering 982 N push at 0.5 MPa) is insufficient to overcome your process friction and inertia. The 75 mm adjustment range is ideal for machinery requiring frequent product-size changeovers, allowing operators to dial in the exact end-stop without swapping cylinders or adding external stopper blocks. For fixed-position runs, a standard SAI cylinder offers the same ISO 15552 footprint without the adjustment hardware.
When ordering, specify the 80 mm bore, 270 mm stroke, 75 mm adjustment, PT port threads, and SUS420J2 rod material. Because the 270 mm stroke exceeds 300 mm? No, but even at 270 mm, an unsupported load can induce side-loading; use an external guide rail to prevent rod bending and premature seal wear. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 accessories.
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 SAIJ80AX270-75 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it achieves 513 kgf.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 270 mm nominal stroke by up to 75 mm, yielding a usable travel range of 195 to 270 mm. It decelerates the travel end but does not lock or hold the load without live air pressure.
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