Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50 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 SAIJ80X280-50
The AirTAC SAIJ80X280-50 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. By turning the external screw at the rear, you can trim the effective travel back by up to 50 mm, providing a usable stroke window of 230 to 280 mm without changing the cylinder.
This 80 mm bore utilizes a G3/8 port and a 25 mm carbon steel rod with an M20x1.5 thread, offering excellent resistance against side loads. The extruded aluminum barrel features sensor grooves on both sides for straightforward switch mounting. It is important to note that the rear adjuster acts purely as a travel stop to decelerate the piston, not as a locking device, so it will not hold a load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50 |
|---|---|
| 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 SAIJ80X280-50
| 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 SAIJ80X280-50 Is Used
Product Changeovers
Dial in the new end-stop distance instantly when switching product sizes on a packaging line, utilizing the 50 mm adjustment window to avoid mechanical rebuilds.
Machine Setup
Fine-tune the exact retraction point during equipment commissioning, ensuring perfect alignment of heavy 80 mm bore tooling without machining custom spacers.
Variable End Stops
Accommodate varying package lengths on a conveyor sorting system by adjusting the rear stopper within the 230 to 280 mm travel range as needed.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559N push at 0.5 MPa) but does not need the full capacity of a 100 mm unit. The adjustable stroke is particularly valuable during machine commissioning or product changeovers, allowing you to fine-tune the end position on the fly instead of swapping out a fixed-stroke SAI cylinder or adding external mechanical stops. Because the nominal stroke is 280 mm, ensure an external guide is used to support the load and prevent excessive side-loading on the rod.
For a true ISO 15552 replacement match, verify the 80 mm bore, 280 mm stroke, 50 mm adjustment range, PT tapered port threads, and the required mounting style. SAIJ supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR options. If your process requires the load to be held securely without live air, this standard cylinder will not suffice; consider an AirTAC SAIL or BSAI locking cylinder instead.
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 SAIJ80X280-50 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513N of push force and 2268N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 3518N.
The rear adjuster screw allows you to shorten the 280 mm nominal stroke by up to 50 mm, creating a usable travel window of 230 to 280 mm. This stopper only sets the end position; it does not lock the load without air pressure.
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