Airtac SAI63 Standard Cylinder SAI63X425
The AirTAC Airtac SAI63 Standard Cylinder SAI63X425 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 SAI63X425
The AirTAC SAI63X425 is a double-acting ISO 15552 profile cylinder engineered to deliver a push force of 1559 N and a pull force of 1402 N at 0.5 MPa. Its extruded aluminum barrel design omits tie rods, providing a smooth exterior that integrates seamlessly into modern machinery. The 425 mm stroke handles substantial linear travel requirements with precision.
This model features a standard carbon steel piston rod for high tensile strength. The barrel incorporates dual sensor grooves, allowing for direct mounting of CMSE or DMSE switches when a magnet is specified. Seals are standard TPU, but Viton (H) options are available for environments operating near the upper temperature limits.
Airtac SAI63 Standard Cylinder SAI63X425 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63X425 |
|---|---|
| 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 SAI63X425
| 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 SAI63X425 Is Used
Automated Pressing
Applies 1559 N of push force at 0.5 MPa for seating bearings or stamping light components in automated assembly lines.
Material Diversion
Utilizes the 425 mm stroke to push heavy pallets or products across wide conveyor belts during sorting operations.
Clamping Fixtures
Secures large workpieces during machining, relying on the 1402 N pull force to retract the clamp safely.
Is the Airtac SAI63 Standard Cylinder SAI63X425 the Right Cylinder?
Selecting this 63 mm bore over the smaller 50 mm variant increases your 0.5 MPa push force from 982 N to 1559 N, making it suitable for heavier actuation tasks. If your application requires less thrust, stepping down to a 40 mm bore yields 628 N. For this 425 mm stroke, the unsupported rod length is significant; side loads can cause rod-bearing bending and premature wear. Employ external guide rails or a guided cylinder to absorb lateral forces.
This unit uses a G3/8 PT tapered port and adjustable air cushions at both ends to decelerate the piston smoothly. Note that standard SAI cylinders do not hold position if air pressure drops; for dead-load holding, consider the SAIL variant with an air-released lock or an external pilot check valve. Being dimensionally interchangeable per ISO 15552, it serves as a drop-in replacement for other ISO 15552 profile cylinders.
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 SAI63X425 FAQ
At 0.5 MPa, this double-acting cylinder provides a push force of 1559 N and a pull force of 1402 N. If operating pressure increases to 0.7 MPa, the push force reaches 2182 N.
Yes, the SAI63X425 is a genuine ISO 15552 profile cylinder. Its standardized mounting dimensions make it interchangeable with other ISO 15552 cylinders, serving as a direct drop-in replacement.
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