Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40S 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 SAIJ80X280-40S
The AirTAC SAIJ80X280-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 240 to 280 mm, allowing you to dial back the nominal 280 mm stroke by up to 40 mm during commissioning without swapping hardware. It delivers a robust 3518 N push force at 0.7 MPa, making it well-suited for heavy positioning tasks.
This variant includes a magnet for position sensing with CMSE reed or DMSE electronic switches. It uses a G3/8 port and a 25 mm carbon steel rod with an M20x1.5 thread. The extruded aluminum barrel integrates sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1 and TCM2 options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40S |
|---|---|
| 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 SAIJ80X280-40S
| 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 SAIJ80X280-40S Is Used
Machine Setup Tuning
Fine-tune the 240-280 mm travel window during initial commissioning to perfectly time the machine cycle without adding external stopper blocks.
Product Size Changeover
Adjust the retract end-position on the fly when running a new product batch on a conveyor line, saving downtime from mechanical retooling.
Heavy Positioning Stops
Leverage the 3518 N thrust at 0.7 MPa to move heavy pallets or fixtures, relying on the rear screw to set the exact end-of-stroke location.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-40S the Right Cylinder?
Choose this 80 mm bore when you need higher thrust than the 63 mm bore (which provides 2182 N push at 0.7 MPa), but do not require the 5497 N output of the 100 mm version. The 40 mm adjustment range is ideal for product changeovers on a line, letting you fine-tune the retract end-position quickly. Because the 280 mm stroke exceeds 300 mm is not met here, but for any unsupported tooling at this length, an external guide is still recommended to manage side-load.
For ISO 15552 replacement matching, verify the 80 mm bore, 280 mm stroke, 40 mm adjustment, G3/8 PT port, and the -S magnet. Remember that the rear adjuster acts only as a travel stop and the air cushions manage deceleration; neither holds the load without live air. For true load-holding without pressure, use an external rod lock or consider the AirTAC 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 SAIJ80X280-40S FAQ
At a 0.7 MPa operating pressure, this 80 mm bore cylinder provides 3518 N of push force and 2268 N of pull force. The maximum thrust is 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 280 mm down to 240 mm. This creates a 240-280 mm adjustable window for precise end-position tuning without changing the cylinder.
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