Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 290mm 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
- Stroke290 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40S
The AirTAC SAIJ80X290-40-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you dial back the 290 mm nominal travel by up to 40 mm. This yields a usable 250-290 mm end-position window for fine-tuning at commissioning. It delivers a robust 4523 N push force at 0.9 MPa, making it suitable for heavy handling tasks.
Equipped with a -S magnet, the extruded aluminum barrel integrates sensor grooves on both sides for direct mounting of AirTAC CMSE reed and DMSE electronic switches. The 25 mm carbon steel rod and M20x1.5 thread provide high rigidity, while the PT G3/8 ports ensure adequate flow. The rear stopper sets the end position but does not lock the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 290 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 SAIJ80X290-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×290 | 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 SAIJ80X290-40S Is Used
Machine Changeover
Fine-tune the 250-290 mm travel window during product size transitions to set precise end stops without swapping cylinders.
Heavy Clamping
Apply up to 4523 N of push force for secure holding of large parts during machining or welding operations.
Variable Diverting
Adjust the stroke length on the fly to meet different package sizes on a conveyor sorting line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40S the Right Cylinder?
Choose this 80 mm bore when 50 mm bore cylinders (providing 1767 N push at 0.9 MPa) lack the power for heavier fixtures, but a 100 mm bore (7068 N) would be excessive. The 40 mm adjustment range is ideal for product changeovers where exact end-of-stroke positioning varies without adding external stops. For load-holding without live air, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is only a stop.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting footprints using the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts. Because the 290 mm stroke is relatively long, ensure external guides support the load to prevent excessive side-loading on the rod.
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 SAIJ80X290-40S FAQ
At 0.9 MPa operating pressure, this 80 mm bore cylinder generates 4523 N of push force and 2268 N of pull force.
The rear adjuster screw lets you shorten the 290 mm nominal stroke by up to 40 mm, providing a usable travel window of 250 to 290 mm for precise end-position tuning.
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