Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-75S 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 SAIJ80X120-75S
The AirTAC SAIJ80X120-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 45 to 120 mm, letting you dial back the nominal 120 mm stroke by up to 75 mm during machine setup. This fine-tuning capability eliminates the need to swap cylinders or bolt on external stops when product sizes change. It delivers a robust 2513 N push force at 0.5 MPa.
Equipped with a -S magnet, this model supports AirTAC CMSE reed and DMSE solid-state sensors housed in the dual-side barrel grooves. The 25 mm carbon steel rod and M20x1.5 thread handle high side loads, while the PT tapered G3/8 ports ensure reliable sealing. The rear adjuster acts strictly as a travel stop for end-position deceleration, not as a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-75S |
|---|---|
| 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 SAIJ80X120-75S
| 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 SAIJ80X120-75S Is Used
Variable End-Stop Tuning
Dial in the exact 45 to 120 mm travel distance during machine commissioning to accommodate different product lengths without changing hardware.
Product Changeover
Quickly retract the rear stopper by up to 75 mm when a production line switches to a shorter package size, minimizing downtime.
Assembly Pressing
Leverage the 2513 N push force at 0.5 MPa to seat components securely, adjusting the final press depth precisely at the workpiece.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-75S the Right Cylinder?
Choose this 80 mm bore when your application requires substantial thrust, such as the 2513 N push or 2268 N pull at 0.5 MPa. If your force requirements are lower, a 63 mm bore provides 1559 N of push force. The adjustable stroke is highly beneficial for commissioning rigs that process varying product sizes, allowing the end-stop to be set precisely without changing the cylinder. For load-holding without live air pressure, this plain SAIJ is insufficient; consider the SAIL or BSAI locking series instead.
To match this ISO 15552 replacement exactly, specify an 80 mm bore, 120 mm stroke, 75 mm adjustment range, PT G3/8 ports, and a magnet for sensors. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 120 mm stroke is under 300 mm, standard mounting handles the load without needing an external guide.
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 SAIJ80X120-75S FAQ
The rear adjuster acts as an external mechanical stop, allowing you to trim the effective stroke back from 120 mm down to 45 mm. It sets the travel end and works with the air cushion for deceleration, but it does not lock or hold the load without continuous air pressure.
At 0.5 MPa, it provides 2513 N of push force and 2268 N of pull force. If operated at 0.7 MPa, the push force increases to 3518 N.
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