Airtac SAI63 Standard Cylinder SAI63X425S
The AirTAC Airtac SAI63 Standard Cylinder SAI63X425S 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 SAI63X425S
The AirTAC SAI63X425-S is a double-acting ISO 15552 profile cylinder engineered to deliver 1559 N of push force at 0.5 MPa. Its 425 mm stroke is well-suited for mid-range linear actuation tasks requiring substantial reach. As a genuine AirTAC component, it guarantees dimensional interchangeability with standard ISO 15552 profile body cylinders.
This specific configuration includes a standard carbon steel piston rod and a built-in magnet (-S) for seamless integration with CMSE and DMSE series sensor switches. The extruded aluminum barrel features sensor grooves on both sides, simplifying switch placement. For environments requiring higher heat resistance, alternative TPU seals can be swapped for Viton (H) or NBR (N) elastomers.
Airtac SAI63 Standard Cylinder SAI63X425S Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63X425S |
|---|---|
| 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 SAI63X425S
| 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 SAI63X425S Is Used
Material Transfer Gates
Provides the 1559 N force and 425 mm extension needed to actuate large diverter gates on high-throughput package conveyor lines.
Automated Press Stands
Drives mid-stroke pressing operations in light assembly machinery where consistent 0.5 MPa thrust is required.
Pallet Positioning Stops
Extends to halt or align heavy pallets at processing stations, utilizing the full 425 mm stroke for wide conveyor offsets.
Is the Airtac SAI63 Standard Cylinder SAI63X425S the Right Cylinder?
Because this 425 mm stroke exceeds the 300 mm threshold, the unsupported rod is vulnerable to bending under side loads. To prevent premature rod-bearing wear, guide the load externally or utilize a guided cylinder assembly. If an application requires holding a load without continuous air pressure, note that the standard air cushions only decelerate the piston at stroke ends and do not lock the rod; utilize a SAIL pneumatic lock variant or an external pilot-operated check valve for secure positioning. When specifying replacements, match the 63 mm bore, 425 mm stroke, G3/8 PT port, and TC trunnion or FA flange mounts.
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 SAI63X425S FAQ
At 0.5 MPa operating pressure, the SAI63X425-S generates 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
Yes. The SAI is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 standard cylinders. Ensure your mounting interface and G3/8 port match.
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