Airtac SAI63 Standard Cylinder SAI63AX425
The AirTAC Airtac SAI63 Standard Cylinder SAI63AX425 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 SAI63AX425
The AirTAC SAI63X425 is a double-acting ISO 15552 profile cylinder engineered to deliver 1559 N of push force at 0.5 MPa. Its 425 mm stroke makes it highly suitable for mid-range linear actuation tasks that require substantial travel distance without sacrificing power. The extruded aluminum barrel design omits tie-rods, providing a clean exterior that simplifies mounting and sensor placement.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced resistance against corrosion and surface wear. It utilizes PT tapered port threads, and because it lacks the -S magnet suffix, it operates without integrated position sensing. For high-temperature environments up to 70 C, the standard TPU seals handle the demands effectively, though Viton (H) alternatives exist for extreme thermal exposure.
Airtac SAI63 Standard Cylinder SAI63AX425 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63AX425 |
|---|---|
| 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 SAI63AX425
| 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 SAI63AX425 Is Used
Material Diversion
Pushes packages or pallets across a 425 mm transfer gap with 1559 N of thrust at 0.5 MPa, ensuring positive diversion on high-throughput conveyor lines.
Component Ejection
Ejects machined parts from a fixture with a reliable 1402 N pull force, using the extended stroke to clear the work area entirely for robotic loading.
Pallet Positioning
Indexs heavy pallets into a wrapping station, utilizing the robust SUS420J2 rod material to withstand repetitive impact and harsh industrial environments.
Is the Airtac SAI63 Standard Cylinder SAI63AX425 the Right Cylinder?
Selecting this 63 mm bore over the smaller 50 mm variant yields a significant thrust upgrade, jumping from 982 N to 1559 N at 0.5 MPa. If your application requires less force and faster cycling, stepping down to the 40 mm bore offers 628 N. Because this model features a 425 mm stroke, the extended unsupported rod is vulnerable to bending under side loads. To prevent premature rod-bearing wear, implement an external guide rail or utilize a guided cylinder assembly.
This cylinder serves as a dimensionally interchangeable drop-in replacement per ISO 15552 standards, matching the 63 mm bore, 425 mm stroke, G3/8 port, and standard mounting accessories like the FA flange or TC trunnion. Note that a standard SAI does not hold its position if air pressure is lost; the piston will drift. If your workflow requires load holding upon exhaust, consider the SAIL variant with an air-released lock or 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 SAI63AX425 FAQ
At a standard operating pressure of 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 2182 N.
Yes, the SAI63X425 is dimensionally interchangeable per ISO 15552. You can drop it in to replace other ISO 15552 profile cylinders by matching the 63 mm bore, 425 mm stroke, G3/8 port, and your chosen mounting accessory.
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