Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75S 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 SAIJ80AX270-75S
The AirTAC SAIJ80X270-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a robust 2513N pull force at 0.5MPa and uses a PT G3/8 port. The integrated -S magnet enables precise position detection with CMSE reed and DMSE electronic sensors.
With a 270mm nominal stroke and a 75mm adjustment range, this SKU yields a usable travel window of 195-270mm. This built-in adjuster acts as a mechanical stop to fine-tune the retract end position during commissioning without adding external stops. The piston rod utilizes SUS420J2 stainless steel for corrosion resistance, and the extruded aluminum barrel design omits tie-rods for a clean profile.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75S |
|---|---|
| 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 SAIJ80AX270-75S
| 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 SAIJ80AX270-75S Is Used
Machine Changeovers
Dial in the 195-270mm travel window during product size transitions to set new retract positions without physically swapping cylinders or adding external mechanical stops.
End-Position Tuning
Fine-tune the exact retract end-position during initial commissioning to perfect a process, absorbing mechanical tolerance variations quickly via the rear adjustment screw.
Variable End Stops
Adjust the effective stroke on the fly for diverter arms or pushers on a conveyor line, accommodating different package lengths without reprogramming the motion controller.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-75S the Right Cylinder?
Choose this 80mm bore when an application requires higher thrust than a 63mm bore (1402N pull at 0.5MPa) but less than a 100mm bore (3681N pull). The 75mm adjustable stroke is ideal for product-size changeovers on a packaging line, allowing operators to dial in the exact end-of-stroke position quickly instead of swapping out a fixed-stroke SAI cylinder. Standard operating speed is 30-800mm/s.
When matching ISO 15552 replacements, verify the 270mm stroke, 75mm adjustment, PT G3/8 port, and -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 270mm stroke is relatively long, an external guide is recommended to handle side loads. Note that the rear adjuster is a travel stop, not a lock; the cylinder will not hold its load without live air pressure. For true load-holding, consider the SAIL or BSAI series.
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 SAIJ80AX270-75S FAQ
At 0.5MPa it provides 2513N of push force and 2268N of pull force. At 0.7MPa the push force increases to 3518N, and at 0.9MPa it reaches 4523N. The maximum operating pressure is 1.0MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the 270mm nominal length down to 195mm. It is a travel stop for fine-tuning end positions, not a lock, so the cylinder requires live air pressure to hold its load.
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