Airtac SAIJ80 Adjustable Cylinder SAIJ80BX290-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX290-40S 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 SAIJ80BX290-40S
The AirTAC SAIJ80X290-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 250 to 290 mm. Built with a SUS304 stainless steel rod (option B) and a PT tapered port, it generates 2513 N of pull force at 0.5 MPa. The extruded aluminum barrel features sensor grooves on both sides for straightforward positioning feedback.
This adjustable-stroke model allows you to fine-tune the retract end position during commissioning without adding external stops. It includes a magnet for CMSE reed and DMSE electronic sensors, and relies on variable air cushions at both ends to decelerate the load. The rear adjuster functions strictly as a travel stop, meaning it will not hold the load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX290-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX290-40S |
|---|---|
| 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 SAIJ80BX290-40S
| 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 SAIJ80BX290-40S Is Used
Machine Changeover
Dial in the 250-290 mm retract position during product size transitions without physically swapping the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the final retract stop during commissioning to dial out mechanical tolerances and achieve precise placement of 80 mm bore tooling.
Variable Diverter
Adjust the stroke on the fly for a conveyor sorting arm that handles multiple package sizes, using the 40 mm trim range to alter the divert point.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX290-40S the Right Cylinder?
Choose this 80 mm bore when your application requires 2513 N of pull force at 0.5 MPa, stepping up from a 63 mm bore that provides 1402 N. The SAIJ80X290-40-S is selected when you need a variable end-stop to accommodate product changeovers, rather than relying on a fixed-stroke SAI cylinder. To match this ISO 15552 interchangeable cylinder, specify an 80 mm bore, 290 mm stroke, 40 mm adjustment, PT port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and the -S magnet.
Because the 290 mm stroke exceeds 300 mm when fully extended with long unsupported loads, adding an external guide rail is recommended to manage side loads. Furthermore, if your machine requires true load-holding without live air pressure, this cylinder's adjuster cannot act as a brake; you should instead consider an SAIL air-released lock or BSAI clamp-lock cylinder.
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 SAIJ80BX290-40S FAQ
The rear adjuster screw lets you shorten the nominal 290 mm stroke by up to 40 mm, creating a usable travel window of 250 to 290 mm. This allows you to set the exact retract end position during commissioning without needing a different cylinder.
It operates at speeds of 30-800 mm/s and uses a 25 mm rod with an M20x1.5 thread.
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