Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-50S 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 SAIJ63AX225-50S
The AirTAC SAIJ63X225-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 225 mm travel but integrates an external stopper screw that allows you to dial the effective stroke back by up to 50 mm. This creates a precise 175 to 225 mm usable travel window, letting you fine-tune the retract end position at commissioning without swapping out the barrel or adding external stops.
In the 63 mm bore class, this cylinder delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, scaling up to 2805 N push at 0.9 MPa. This specific SKU is built with a SUS420J2 stainless steel rod for enhanced durability against moisture and includes a piston magnet for position sensing. It is fully compatible with AirTAC CMSE reed and DMSE solid-state electronic switches mounted into the dual-side sensor grooves on the extruded aluminum barrel.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-50S |
|---|---|
| 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 SAIJ63AX225-50S
| 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 SAIJ63AX225-50S Is Used
Machine Changeover
Dial in the 175 to 225 mm travel window during product size transitions without physically replacing the cylinder or reworking the fixture plate.
End-Stop Tuning
Use the rear adjuster screw to precisely set the retract position during commissioning, absorbing mechanical tolerance variations in the assembly.
Process Testing
Vary the stroke dynamically across a 50 mm range to test different actuation distances or clamping depths on a single ISO 15552 fixture.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-50S the Right Cylinder?
Choose this 63 mm bore adjustable-stroke model when your application requires 1559 N of thrust at 0.5 MPa but demands exact end-position tuning during machine setup or product changeover. If your process requires less force, stepping down to a 50 mm bore yields 982 N of push force; for heavier payloads, stepping up to an 80 mm bore provides 2513 N.
Because this is a standard double-acting cylinder, the rear adjuster acts only as a travel stop and cannot hold a load without live air pressure. For fail-safe load holding, consider the SAIL pneumatic lock or BSAI clamp-lock series. This SAIJ63X225-50-S features PT tapered port threads (G3/8), a 20 mm rod with an M16x1.5 thread, and supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. As the 225 mm stroke exceeds 300 mm thresholds for external guides, standard side-load rules apply, though an external guide is recommended for heavy lateral loads.
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 SAIJ63AX225-50S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.9 MPa, the push force increases to 2805 N.
The rear stopper screw allows you to shorten the nominal 225 mm stroke by up to 50 mm. This provides an adjustable travel window between 175 mm and 225 mm, enabling fine-tuning of the end position without external stops.
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