Airtac SAI63 Standard Cylinder SAI63AX135
The AirTAC Airtac SAI63 Standard Cylinder SAI63AX135 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAI63 Standard Cylinder SAI63AX135
The AirTAC SAI63X135 is a double-acting ISO 15552 profile cylinder engineered to deliver 1559N of push force at 0.5MPa. This 63mm bore and 135mm stroke configuration is ideal for mid-range automation tasks requiring consistent mid-stroke positioning. The extruded aluminum barrel design omits tie rods, providing a smooth exterior that resists dust accumulation.
For demanding environments, this specific unit is configured with a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance. It features tapered PT port threads and lacks a standard magnet; add the -S suffix if you need to mount CMSE or DMSE sensors in the dual side grooves.
Airtac SAI63 Standard Cylinder SAI63AX135 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63AX135 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAI63AX135
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SAI63AX135 Is Used
Component Clamping
Provides 1559N of clamping thrust at 0.5MPa to secure steel workpieces during CNC milling operations.
Diverting Arm
Actuates a mid-stroke diverting arm to sort medium-weight packages on an assembly line conveyor.
Gate Control
Powers safety gates and machine access doors, utilizing the 135mm stroke for smooth opening cycles.
Is the Airtac SAI63 Standard Cylinder SAI63AX135 the Right Cylinder?
Choose this 63mm bore when a 50mm bore falls short of the required 982N push force at 0.5MPa, but avoid stepping up to an 80mm bore (2513N at 0.5MPa) unless your application strictly demands the extra thrust. The 135mm stroke provides a practical mid-range extension for compact machinery.
Because this cylinder is double-acting, it requires continuous air pressure to hold its position; exhausting the air or centering the valve will cause the piston to drift. If your setup must hold a load safely without live pressure, specify the SAIL variant with an air-released lock or use an external pilot-operated check valve. This SAI63X135 is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders with a 63mm bore, 135mm stroke, G3/8 port, and standard mounting accessories like FA flanges or TC trunnions.
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 SAI63AX135 FAQ
At a 0.5MPa operating pressure, this 63mm bore cylinder generates 1559N of push force and 1402N of pull force. At 0.7MPa, the push force increases to 2182N.
No, the standard SAI is a double-acting cylinder and will drift if air pressure is lost or the valve is centered. The adjustable air cushion only decelerates the piston near the stroke end. For fail-safe load holding, use the SAIL variant or an external rod lock.
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