Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 120mm 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
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-40
The AirTAC SAIJ80X120-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 3518N of push force at 0.7MPa, utilizing a 25mm carbon steel rod and G3/8 PT ports. The integrated rear stopper allows you to fine-tune the effective travel within an 80 to 120mm window, providing precise end-position calibration without adding external stops.
This adjustable unit shares the standard extruded aluminum barrel with dual-side sensor grooves, but uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) omitting FB and CA options. The rear screw functions strictly as a travel stop to set deceleration endpoints, not as a load-holding lock; maintaining position requires continuous air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAIJ80X120-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SAIJ80X120-40 Is Used
End-Stop Calibration
Dial in the exact retract distance within the 80-120mm window during machine commissioning to accommodate varying material thicknesses without external spacers.
Product Changeover
Quickly adjust the stroke length up to 40mm on packaging lines when switching between different package sizes, minimizing downtime between runs.
Variable Positioning
Set precise mechanical stops for machining operations where the final end-position must be tweaked on the fly to meet strict tolerances.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-40 the Right Cylinder?
Select this 80mm bore when an application requires 3518N of thrust at 0.7MPa but demands variable end-stops for product changeover, avoiding the need to physically swap a fixed-stroke SAI cylinder. If your process requires less force, stepping down to a 63mm bore yields 2182N at 0.7MPa. To match this ISO 15552 replacement exactly, specify the 120mm stroke, 40mm adjustment range, G3/8 PT ports, and standard carbon steel rod.
Because the 120mm stroke is relatively short, side-load risks are minimal, but the 25mm rod thread handles standard loads effectively. For operations needing true load-holding without live air pressure, consider the SAIL or BSAI series instead of relying on the SAIJ adjuster.
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 SAIJ80X120-40 FAQ
At 0.7MPa operating pressure, this 80mm bore cylinder provides 3518N of push force and 2268N of pull force. At its maximum 1.0MPa pressure, it can deliver up to 513kgf.
The rear adjuster acts as a mechanical stop that trims the effective travel back by up to 40mm, creating an 80 to 120mm usable stroke window. It sets the end-position and deceleration point but does not lock the load without live air.
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