Airtac SAIJ80 Adjustable Cylinder SAIJ80AX290-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX290-40S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke290 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX290-40S
The AirTAC SAIJ80X290-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 290 mm travel to a precise usable window of 250-290 mm. This on-the-fly tuning is ideal for product changeovers, letting you set exact end positions at commissioning without swapping the barrel or adding external stops.
Built for position feedback, the -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves. The piston rod uses SUS420J2 stainless steel for superior corrosion resistance, and the 25 mm diameter rod with an M20x1.5 thread provides excellent side-load capacity. Remember the rear adjuster acts purely as a mechanical travel stop for deceleration; it is not a lock and will not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX290-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX290-40S |
|---|---|
| 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX290-40S
| 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 SAIJ80AX290-40S Is Used
Carton Forming Changeovers
Dial in the 250-290 mm travel window during packaging format changes, using the rear stopper to set precise folding positions without changing hardware.
Variable Product Diverting
Adjust the stroke on the fly to route different package sizes on a conveyor belt, tuning the diverter arm end-point exactly where needed.
Machine Setup Commissioning
Fine-tune the end-of-stroke position during initial machine commissioning to dial out mechanical interference and achieve perfect timing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX290-40S the Right Cylinder?
The 40 mm adjustment range is particularly valuable on packaging lines where end-of-stroke positions frequently shift by a few centimeters for different carton sizes, replacing the need to maintain multiple fixed-stroke SAI cylinders in inventory.
For a direct replacement, match the 80 mm bore, 290 mm nominal stroke, 40 mm adjustment range, PT tapered port thread, and the -S magnet requirement. The SAIJ series supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the 290 mm stroke is relatively long, ensure you use an external guide to prevent excessive rod side-loading. If your machine requires the load to stay put during an air loss event, the standard SAIJ cannot hold it; you must specify a SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ80AX290-40S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 290 mm down to as little as 250 mm. This creates a 250-290 mm usable travel window for fine-tuning end positions at commissioning or during product changeovers, without needing to replace the cylinder.
If you increase the pressure to 0.9 MPa, the push force rises to 4523 N.
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