Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-50 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 SAIJ80X140-50
The AirTAC SAIJ80X140-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 140 mm travel back by up to 50 mm, yielding a highly flexible 90-140 mm usable window. Delivering 2513 N of push force and 2268 N of pull force at 0.5 MPa, it is built around a robust 25 mm carbon steel rod and M20x1.5 thread to handle high dynamic loads.
This model uses PT tapered G3/8 ports and includes variable air cushions at both ends to smooth out the heavier moving masses typical of an 80 mm bore. The extruded aluminum barrel features dual sensor grooves, allowing you to easily mount CMSE reed or DMSE electronic switches later if position feedback becomes necessary.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-50 |
|---|---|
| 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 SAIJ80X140-50
| 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 SAIJ80X140-50 Is Used
Variable End-Stop Tuning
Dial in the exact 90 to 140 mm travel distance required for precise product indexing without machining custom external stopper blocks.
Machine Changeover
Quickly adapt end positions on a packaging line when switching between different carton sizes, using the 50 mm rear adjustment range.
Assembly Press Setup
Safely set the exact lower travel limit for a 2513 N press operation at commissioning, preventing over-travel and tooling damage.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-50 the Right Cylinder?
Choose this 80 mm bore when an application requires substantial thrust—such as 2513 N at 0.5 MPa—but demands the ability to fine-tune the end-of-stroke position during commissioning or product changeover without swapping cylinders or adding external stops. If your process requires less force, stepping down to a 63 mm bore yields 1559 N push at 0.5 MPa, whereas stepping up to a 100 mm bore provides 3927 N.
Because the 140 mm stroke is under the 300 mm threshold, side-loading stress on the 25 mm rod is moderate, though external guides are still recommended for heavy off-center loads. Remember that the rear adjuster acts only as a 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. To match this ISO 15552 interchangeable cylinder, specify the 80 mm bore, 140 mm stroke, 50 mm adjustment, PT G3/8 ports, and your required mounting from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ80X140-50 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can deliver up to 4523 N of push force at 0.7 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 140 mm nominal stroke by up to 50 mm, providing a usable travel window of 90 to 140 mm. It only sets the end position and does not lock or hold the load without continuous air pressure.
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