Airtac SAI63 Standard Cylinder SAI63AX125
The AirTAC Airtac SAI63 Standard Cylinder SAI63AX125 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAI63 Standard Cylinder SAI63AX125
The AirTAC SAI63X125 is a double-acting ISO 15552 profile cylinder engineered to deliver 1559 N of push force and 1402 N of pull force at 0.5 MPa. Its 125 mm stroke is perfectly suited for mid-range actuation tasks on automated machinery. The extruded aluminum barrel design omits tie rods, providing a clean exterior that resists operational debris buildup.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It utilizes PT tapered port threading and lacks a built-in magnet, meaning it is optimized for purely mechanical actuation without requiring reed or solid-state sensor tracking.
Airtac SAI63 Standard Cylinder SAI63AX125 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63AX125 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAI63AX125
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SAI63AX125 Is Used
Component Clamping
Secures medium-weight workpieces on machining centers, utilizing its 1559 N push force to hold parts firmly against fixtures during milling or drilling operations.
Package Diversion
Powers diverter arms on packaging lines, using the 125 mm stroke to push cartons cleanly from one belt lane to another at cycling speeds up to 800 mm/s.
Gate Control
Actuates safety gates and machine guarding doors, providing reliable linear motion to open and close physical barriers on automated production cells.
Is the Airtac SAI63 Standard Cylinder SAI63AX125 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (providing 982 N push at 0.5 MPa) lacks the thrust for your moving load, but an 80 mm bore (2513 N at 0.5 MPa) would be physically oversized and consume excess air. The 125 mm stroke length is moderate, keeping side-load stress on the rod bearing relatively low, though external guides are always recommended if absorbing heavy lateral impact. Because it is a genuine AirTAC component built to the ISO 15552 mounting interface, it serves as a drop-in replacement for any standard 63 mm profile cylinder sharing the same mounting footprint and G3/8 port size.
If your machinery requires the piston to hold its position during a loss of air pressure or an emergency stop, do not rely on this standard cylinder's adjustable air cushions, as they only decelerate the rod near the stroke ends. For secure load holding, you must specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant, or install 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 SAI63AX125 FAQ
At 0.5 MPa, this 63 mm bore cylinder generates a push force of 1559 N and a pull force of 1402 N. If operated at the maximum rated pressure of 1.0 MPa, it can deliver a theoretical maximum force of 318 kgf.
No, the standard SAI cylinder cannot hold a load without live air pressure. The adjustable air cushions only decelerate the piston at stroke ends and will not act as a brake. For fail-safe load holding, use the SAIL or BSAI locking variants.
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