Airtac SAIJ80 Adjustable Cylinder SAIJ80X225-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X225-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 225mm 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
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X225-20
The AirTAC SAIJ80X225-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a substantial 4523N of push force at 0.9 MPa and features a 25mm carbon steel piston rod with an M20x1.5 thread. By turning the external rear stopper screw, you can shorten the effective travel, providing a usable stroke window of 205 to 225mm. This mechanism allows for precise end-position tuning at commissioning without needing to swap out the entire cylinder or bolt on external stops.
It is important to note that the rear adjuster acts strictly as a travel stop, not a lock, and cannot hold a load without live air pressure. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed and DMSE electronic solid-state switches, provided a magnet is specified. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X225-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X225-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 225 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 SAIJ80X225-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×225 | 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 SAIJ80X225-20 Is Used
End-Position Tuning
Dial in the exact 205 to 225mm retract distance during commissioning to perfectly strike or seat a part without adding external mechanical stops.
Product Changeover
Quickly adapt the cylinder's effective travel on packaging lines when switching to a different product size, minimizing machine downtime.
Machine Setup
Fine-tune the end-of-stroke position during initial assembly to set precise pressing or clamping depths directly on the equipment.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X225-20 the Right Cylinder?
Choose this 80mm bore when you need the 2513N push force at 0.5 MPa of this size class, stepping up from a 63mm bore that provides 1559N, or down from a 100mm bore yielding 3927N. The adjustable 205-225mm window is ideal for machine setups requiring variable end stops or frequent product-size changeovers, offering flexibility that a fixed-stroke SAI cannot match. Because the nominal stroke is 225mm, the 25mm rod handles side loads well, but any application approaching or exceeding 300mm of travel will still require an external guide to prevent binding. For load-holding without continuous live air, this plain cylinder is insufficient; consider the SAIL air-released lock or BSAI clamp-lock instead. To match this ISO 15552 interchangeable replacement, specify: 80mm bore, 225mm stroke, 20mm adjustment, PT tapered port, and no magnet.
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 SAIJ80X225-20 FAQ
At 0.9 MPa operating pressure, this 80mm bore double-acting cylinder generates 4523N of push force and 4069N of pull force. At a standard 0.5 MPa, it provides 2513N push and 2268N pull.
The rear adjuster screw acts as a mechanical stop that lets you trim the 225mm nominal stroke back by up to 20mm, creating a usable travel window of 205 to 225mm. It functions as a travel stop, not a lock, so it will not hold the load without continuous air pressure.
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