Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40 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 SAIJ80X280-40
The AirTAC SAIJ80X280-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 4523N push force at 0.9 MPa and provides a usable travel window of 240 to 280 mm, letting you dial back the stroke by up to 40 mm during machine commissioning.
This 80mm bore actuator uses a G3/8 port and a 25mm carbon steel rod with an M20x1.5 thread, offering high rigidity against side loads. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, while omitting FB, CA, CB, and CR configurations.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40 |
|---|---|
| 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 SAIJ80X280-40
| 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 SAIJ80X280-40 Is Used
Machine Setup & Changeover
Fine-tune the 240-280mm travel window during commissioning to dial in exact retract positions without machining new hard stops.
Variable Product Sorting
Adjust the stroke on the fly to accommodate different package sizes on a packaging line, ensuring precise mechanical positioning.
End-Position Tuning
Trim up to 40mm off the nominal stroke to compensate for mechanical wear or slight misalignment over the machine's lifecycle.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40 the Right Cylinder?
Choose this 80mm bore model when your application requires substantial force—stepping down to a 63mm bore yields 2805N at 0.9 MPa, while stepping up to 100mm bore provides 7068N. The adjustable stroke is ideal for product changeovers, allowing you to fine-tune the retract end position without swapping the cylinder or adding external stops.
Because the 280mm stroke is moderately long, ensure an external guide supports the load to prevent rod binding. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ cannot hold a load without live air, so for fail-safe holding, consider an AirTAC SAIL or BSAI cylinder. For ISO 15552 replacement, match the 80x280 dimensions, 40mm adjustment, PT tapered ports, and the required mounting interface.
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 SAIJ80X280-40 FAQ
At 0.9 MPa operating pressure, the 80mm bore provides a push force of 4523N and a pull force of 2268N. It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from 280mm down to 240mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
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