Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm 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.
- BoreØ63 mm
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S
The AirTAC SAIJ63X225-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 1559N of pull force at 0.5 MPa and features a 205-225mm usable travel window, letting you trim the effective stroke by up to 20mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This configuration includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and a magnet (-S) for position detection. It is designed to accept PT tapered port threads and operates at speeds of 30-800mm/s. The rear adjuster acts purely as a travel stop to fine-tune the end position without needing external stops.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S Is Used
Product Changeover
Dial in the 205-225mm travel window during format changes to accommodate different package lengths without replacing the actuator.
End-Stop Calibration
Fine-tune the retract position during machine setup to achieve exact tooling alignment, avoiding the need for external mechanical stops.
Variable Diverting
Adjust the stroke length on the fly for pneumatic diverters that handle varying product sizes on a single conveyor line.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S the Right Cylinder?
Choose this 63mm bore when a 50mm bore (825N pull at 0.5MPa) lacks the force for your product changeover tasks, but an 80mm bore (2268N pull) is physically oversized. The adjustable 205-225mm window is ideal for lines running multiple product sizes, allowing exact end-position tuning without swapping cylinders. For any 225mm stroke, ensure an external guide supports the load, as the 20mm rod thread handles only moderate side loads.
To match this ISO 15552 cylinder, confirm the 63mm bore, 225mm stroke, 20mm adjustment, PT ports, and the -S magnet for CMSE or DMSE sensors. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Note that the rear adjuster is a stop, not a lock; for load-holding without live air, use an external rod lock or a SAIL cylinder.
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20S FAQ
At 0.5 MPa operating pressure, this 63mm bore cylinder provides 1559N of pull force and 2182N of push force. At the maximum 1.0 MPa pressure, it achieves 318 kgf.
The rear adjuster screw allows you to shorten the nominal 225mm stroke by up to 20mm, creating a 205-225mm usable travel window. It functions as a mechanical stop for end-position tuning, not a lock, meaning the cylinder requires live air to hold its load.
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