Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30 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 SAIJ80X270-30
The AirTAC SAIJ80X270-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 270 mm stroke that can be dialed back by up to 30 mm, yielding a usable travel window of 240 to 270 mm. Delivering 2513 N of push force at 0.5 MPa, it suits medium-to-heavy industrial tasks.
The rear adjustment screw acts purely as a mechanical stop to fine-tune end positions during commissioning. It does not lock the load without live air pressure. The extruded aluminum barrel includes sensor grooves on both sides, and the carbon steel rod with an M20x1.5 thread handles high side loads well.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30 |
|---|---|
| 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 SAIJ80X270-30
| 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 SAIJ80X270-30 Is Used
Machine Changeover
Dial in the exact end position within the 240-270 mm window during product size changes without physically swapping the actuator.
Variable End-Stop Tuning
Fine-tune the retract position at commissioning to perfect cycle timing and avoid hard mechanical crashes.
Heavy Assembly Pressing
Leverage 2513 N of thrust at 0.5 MPa to seat heavy components, using the adjuster to set the precise pressing depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-30 the Right Cylinder?
Choose this 80 mm bore when 50 mm (982 N at 0.5 MPa) is too weak but 100 mm (3927 N at 0.5 MPa) is oversized. The 30 mm adjustment range is ideal for product changeovers, allowing you to shift the end-stop without swapping the cylinder or adding external stops. For load-holding without continuous air, consider the SAIL or BSAI series.
This model uses a PT G3/8 port and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts. Because the 270 mm stroke is over 300 mm, ensure you use an external guide to prevent rod binding and premature seal wear.
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 SAIJ80X270-30 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 0.9 MPa, the push force increases to 4523 N.
A rear adjustment screw lets you mechanically shorten the effective stroke by up to 30 mm, creating a 240-270 mm travel window. It acts as a stop to tune end positions and requires live air to hold the load.
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