Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 280mm 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
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20
The AirTAC SAIJ80X280-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 260-280 mm usable travel window. Delivering 2513 N of pull force at 0.5 MPa, it handles robust actuation while allowing fine end-position tuning at commissioning without swapping out the unit.
This variant uses a SUS420J2 stainless steel rod for enhanced durability against moisture and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific configuration omits the internal magnet, meaning electronic DMSE or reed CMSE position switches cannot be used without a model change.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 280 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 SAIJ80AX280-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SAIJ80AX280-20 Is Used
Machine Changeover
Dial in the exact retract distance within the 260-280 mm window during product size changes without physically replacing the cylinder or adding external stopper blocks.
End-Stop Tuning
Fine-tune the end-of-stroke position on a conveyor divert arm to compensate for mechanical wear over time, using the rear screw rather than relocating hard mounts.
Assembly Pressing
Apply up to 2513 N of pull force for pressing operations while precisely setting the final lower position via the 20 mm adjustment range at commissioning.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20 the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore's 825 N pull at 0.5 MPa is insufficient but you want to avoid stepping up to a 100 mm frame. The 20 mm rear adjuster acts purely as a travel stop to dial in the exact retract position during product changeover; it does not hold the load without live air pressure. For load-holding requirements, select the SAIL or BSAI series instead.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting footprints but restricts the mounting set to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Because the 280 mm stroke is relatively long, ensure you provide an external guide to support the 25 mm rod and prevent excessive side-loading on the barrel.
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 SAIJ80AX280-20 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of pull force and 3518 N of push force. It can deliver up to 4523 N of push force at the maximum 1.0 MPa pressure.
The rear adjuster screw allows you to shorten the 280 mm nominal stroke by up to 20 mm, creating a 260-280 mm usable travel window. This stopper only sets the end position and does not lock the load without continuous air pressure.
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