Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 140mm 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
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-40
The AirTAC SAIJ80X140-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 140 mm travel back by up to 40 mm. This creates a highly versatile 100-140 mm usable travel window, enabling precise end-position tuning at commissioning without swapping out the physical cylinder or adding external stops. Delivering a robust 4523 N of push force at 0.9 MPa, it is built to handle demanding actuation tasks.
This model features a durable carbon steel piston rod with an M20x1.5 thread, paired with PT (tapered) porting for secure pneumatic connections. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback mounting. It supports a reduced set of ISO 15552 mounting interfaces—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR styles to focus on the most common linear motion setups.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 140 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 SAIJ80X140-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×140 | 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 SAIJ80X140-40 Is Used
Product Changeovers
Dial in the 100-140 mm stroke window during format changes on packaging lines, allowing rapid size adjustments without replacing the cylinder.
Machine Setup Tuning
Fine-tune the end-of-stroke position during initial commissioning to perfect pressing or clamping force without adding external mechanical stops.
Variable End Stops
Accommodate multiple part sizes on a single conveyor or handling station by adjusting the rear stopper within its 40 mm range.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-40 the Right Cylinder?
Choose this 80 mm bore when your application requires substantially more force than a 63 mm cylinder (which provides 2805 N push at 0.9 MPa), but you want to avoid the larger footprint and higher air consumption of a 100 mm bore. The 40 mm adjustment range is particularly valuable for product-size changeovers on a line, allowing operators to dial in the exact end-stop without changing the mounting layout. For fixed-position applications where no end-tuning is required, the standard AirTAC SAI cylinder is a simpler alternative.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 140 mm stroke, 40 mm adjustment requirement, PT port thread, and your chosen mounting kit. Because this is a non-magnet model, it does not support position-sensing switches out of the box; order an -S variant if you require CMSE reed or DMSE electronic sensors. Note that the rear adjuster acts purely as a mechanical travel stop and does not hold the load without live air pressure; for true fail-safe load holding, 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 SAIJ80X140-40 FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates 4523 N of push force and 4071 N of pull force. It operates efficiently at speeds between 30 and 800 mm/s.
The rear adjuster screw allows you to shorten the 140 mm nominal stroke by up to 40 mm, providing a usable travel window of 100 to 140 mm. This mechanical stopper only sets the end position; it does not lock or hold the load without continuous air pressure.
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