Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20
The AirTAC SAIJ80X125-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa and uses a G3/8 port with a 25mm carbon steel rod. By turning the rear screw, you can fine-tune the effective travel anywhere within a 105-125mm window, providing exact end-position tuning without adding external stops.
This adjustable-stroke design is ideal for machine setups requiring frequent product changeovers. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAIJ80X125-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SAIJ80X125-20 Is Used
Product Changeovers
Quickly dial in the 105-125mm travel window during format size changes on a packaging line without swapping out the entire actuator.
End-Position Tuning
Fine-tune the retract stroke end during machine commissioning to prevent mechanical crashes and ensure precise tooling alignment.
Variable Stops
Provide an adjustable physical stop for diverter arms or gating mechanisms on a conveyor system where product sizes frequently vary.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20 the Right Cylinder?
Select this 80mm bore when an application requires higher thrust than a 63mm cylinder (1559N at 0.5 MPa) but has spatial constraints preventing a 100mm bore. The 20mm adjustment range is perfect for dialing in the exact retraction point during commissioning. Remember that the rear adjuster functions strictly as a travel stop, not a lock; the SAIJ80X125-20 cannot hold a load without live air pressure. For positive load-holding, consider an external rod lock or the AirTAC SAIL series.
When replacing an ISO 15552 cylinder, verify the 125mm stroke, 20mm adjustment requirement, PT tapered port threads, and the specific mounting subset. Because the 25mm rod handles side loads well, it is suitable for moderate guiding tasks, though unsupported long strokes always require external guidance.
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 SAIJ80X125-20 FAQ
At an operating pressure of 0.5 MPa, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 125mm nominal stroke by up to 20mm. This creates a usable travel window of 105-125mm, which can be fine-tuned during setup without changing the cylinder's physical mounting.
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