Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20 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 SAIJ80X140-20
The AirTAC SAIJ80X140-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 2513 N of push force at 0.5 MPa. By turning the rear stopper screw, you can shorten the effective travel on the retract end, creating a precise 120 to 140 mm usable stroke window without adding external stops. This cylinder features a 25 mm carbon steel piston rod and PT tapered port threads.
Because it is an extruded aluminum profile cylinder, it is dimensionally interchangeable per ISO 15552 mounting interfaces. The rear adjuster acts purely as a travel stop to set the end position during commissioning; it is not a lock and will not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20 |
|---|---|
| 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 SAIJ80X140-20
| 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 SAIJ80X140-20 Is Used
End-Position Tuning
Dial in the exact retract position within the 120-140 mm window during machine commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adjust the stroke stopper on packaging or assembly lines to accommodate slight variations in new product sizes.
Assembly Actuation
Provide consistent 2513 N pressing force at 0.5 MPa while allowing operators to fine-tune the travel limit for delicate components.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20 the Right Cylinder?
Choose this 80 mm bore if your application requires around 2513 N of thrust at 0.5 MPa (or 3518 N at 0.7 MPa). If you need less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa, while moving up to a 100 mm bore provides 3927 N. The adjustable stroke is highly beneficial when you need to fine-tune end positions during machine setup or product changeovers, offering flexibility that a fixed-stroke SAI cylinder cannot match.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 140 mm nominal stroke, 20 mm adjustment range, PT port threads, and your required mounting option. SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that this 140 mm stroke is well within standard limits, so external side-load guides are generally unnecessary unless heavy lateral forces are present.
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 SAIJ80X140-20 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 lets you shorten the 140 mm nominal stroke by up to 20 mm, giving a usable travel window of 120 to 140 mm. It only sets the end position and does not lock the load without live air pressure.
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