Airtac SAI63 Standard Cylinder SAI63AX425S
The AirTAC Airtac SAI63 Standard Cylinder SAI63AX425S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 425mm 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
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAI63 Standard Cylinder SAI63AX425S
The AirTAC SAI63X425-S is a double-acting ISO 15552 profile cylinder engineered for standardized mounting and robust actuation. Delivering a push force of 1559 N at 0.5 MPa, this 63 mm bore unit is built to handle demanding industrial loads. The 425 mm stroke provides ample extension for mid-range machinery cycles.
This configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. Equipped with a magnetic piston (-S), it seamlessly integrates with CMSE or DMSE reed switches fitted into the dual sensor grooves on the extruded aluminum barrel. It also utilizes PT tapered port threads and adjustable air cushions at both ends to manage end-of-stroke impact.
Airtac SAI63 Standard Cylinder SAI63AX425S Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63AX425S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 425 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 SAI63 Standard Cylinder SAI63AX425S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×425 | 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 SAI63 Standard Cylinder SAI63AX425S Is Used
Automated Forming Press
Provides the 1559 N push force at 0.5 MPa required to actuate medium-duty forming tools and stamping dies over a 425 mm working distance.
Pallet Diverting Gate
Extends fully to redirect heavy pallets on a sorting line, utilizing the adjustable air cushions to decelerate the 425 mm stroke smoothly without slamming.
Material Lift Station
Raises lightweight industrial components to an elevated processing tier, relying on the SUS420J2 stainless rod to resist moisture in humid factory environments.
Is the Airtac SAI63 Standard Cylinder SAI63AX425S the Right Cylinder?
Selecting this 63 mm bore makes sense when a 50 mm bore falls short—offering 575 N more push force at 0.5 MPa—and a larger 80 mm unit would be physically excessive. Because the 425 mm stroke creates a long unsupported rod extension, it is highly susceptible to bending under side loads. To prevent premature rod-bearing wear, pair this cylinder with external guide rails or choose a fully guided cylinder for heavy off-center loads.
As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard cylinder matching those interface dimensions, requiring only a PT G3/8 port connection and your chosen mounting accessory like an FA flange or TC trunnion. Note that the standard SAI lacks a locking mechanism; if the air supply is exhausted, the rod will drift. For suspended loads that must hold position without live pressure, specify the SAIL variant or use an external pilot-operated check valve.
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 SAI63 Standard Cylinder SAI63AX425S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, the theoretical push force reaches 318 kgf.
Yes, the SAI63X425-S is dimensionally interchangeable per ISO 15552. You can drop it in as a replacement for other ISO 15552 profile cylinders with a 63 mm bore, 425 mm stroke, and G3/8 PT port, provided your mounting hardware matches the standard interface.
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