Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40 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 SAIJ80X290-40
The AirTAC SAIJ80X290-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 290 mm nominal stroke by up to 40 mm for a precise 250-290 mm usable travel window. Built with a carbon steel rod and PT tapered ports, it delivers a robust 2513 N push force at 0.5 MPa, making it ideal for heavy-duty positioning tasks.
Instead of adding external stops or swapping cylinders during product changeovers, the integrated rear screw lets you fine-tune the retract end-position on the fly. This extruded aluminum profile cylinder features sensor grooves on both sides and utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on some standard variants.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40 |
|---|---|
| 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 SAIJ80X290-40
| 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 SAIJ80X290-40 Is Used
Product Changeover
Quickly modify the 250-290 mm retract end-stop to accommodate different package lengths on a packaging line without changing out the cylinder.
Machine Setup
Fine-tune the final resting position of a heavy press during commissioning, using the 40 mm adjustment window to perfect the mechanical timing.
Variable End Stops
Act as an adjustable diverter on a conveyor system, where the exact stroke distance needs occasional tweaking to handle varying product widths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-40 the Right Cylinder?
Select this 80 mm bore when a 50 mm bore (982 N push at 0.5 MPa) lacks the thrust for your payload, but a 100 mm bore (3927 N push) would be excessive overkill. The adjustable 250-290 mm travel window is chosen over a fixed-stroke SAI cylinder when a machine handles multiple product sizes and requires rapid, tool-less end-stop modifications during commissioning. For a direct ISO 15552 replacement, match the 80 mm bore, 290 mm stroke, 40 mm adjustment, G3/8 PT port, and mounting style.
Because the 290 mm stroke approaches the mid-to-high range, ensure external guide rails support the load to prevent excessive side-loading on the 25 mm rod. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true pneumatic locking without pressure, consider an AirTAC SAIL or BSAI 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 SAIJ80X290-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw acts as a mechanical stop that shortens the 290 mm nominal stroke by up to 40 mm, giving a usable travel window of 250-290 mm. It sets the end position but does not lock the load without continuous air pressure.
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