Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-75S 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 SAIJ80X270-75S
The AirTAC SAIJ80X270-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 195-270 mm from its 270 mm nominal stroke. It delivers a robust 2513 N pull force at 0.5 MPa, making it well-suited for heavy manipulation tasks. The integrated -S magnet allows for precise position sensing using CMSE reed or DMSE solid-state switches.
This model features a 25 mm carbon steel rod and a G3/8 PT tapered port. The rear adjustment mechanism acts purely as a travel stop to fine-tune end positions during setup, meaning it cannot hold a load without continuous air pressure. For true load-holding, consider the SAIL or BSAI variants. The extruded aluminum barrel supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-75S |
|---|---|
| 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 SAIJ80X270-75S
| 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 SAIJ80X270-75S Is Used
Machine Setup Changeover
Dial in the exact 195-270 mm end position during product family changeovers without physically replacing the cylinder or bolting on external stoppers.
Variable End-Stop Forming
Adjust the rear stopper to tune the final metal-forming or clamping depth on the fly, ensuring precise dimensional accuracy across different batch runs.
Heavy Payload Positioning
Leverage the 2513 N pull force to shift heavy workpieces, using the 75 mm travel window to accommodate varying material lengths on the same conveyor line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-75S the Right Cylinder?
Choose this 80 mm bore when your application requires higher force than a 63 mm cylinder, which provides 1402 N of pull force at 0.5 MPa. The 75 mm adjustment range is ideal for production lines running multiple product sizes, allowing you to reposition the end-stop during changeover without swapping the cylinder or adding external stops. Because the 270 mm stroke exceeds 300 mm only marginally, side-load risks are moderate, but an external guide is still recommended for heavy lateral loads.
To replace this cylinder with an equivalent ISO 15552 unit, match the 80 mm bore, 270 mm stroke, 75 mm adjustment, G3/8 PT port, and the -S magnet option. Remember that the rear adjuster only decelerates the piston; it does not function as a mechanical 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 SAIJ80X270-75S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of pull force and 3518 N of push force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw lets you shorten the effective travel from the 270 mm nominal stroke down to 195 mm. This creates a 75 mm adjustable window for fine-tuning the retract end position at commissioning without changing the cylinder's physical mounting.
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