Airtac SAI125 Standard Air Cylinder SAI125AX50
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX50
The AirTAC SAI125X50 is a double-acting ISO 15552 profile cylinder offering a robust 6136 N push force at 0.5 MPa. Its 50 mm stroke is ideal for short, high-force clamping and pressing operations. The extruded aluminum barrel design eliminates tie-rods, providing a clean exterior that resists mechanical debris.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in humid environments. It uses PT tapered port threads and lacks a standard magnet, meaning it is optimized for pure mechanical force delivery rather than direct position sensing.
Airtac SAI125 Standard Air Cylinder SAI125AX50 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI125 Standard Air Cylinder SAI125AX50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SAI125 Standard Air Cylinder SAI125AX50 Is Used
Heavy-Duty Stamping
Provides the intense short-stroke thrust needed for metal forming, stamping, and riveting operations in fabrication shops.
Automotive Assembly
Executes robust pressing and joining tasks for automotive components, utilizing its 125 mm bore to deliver reliable high-force actuation.
Pallet Clamping
Secures heavy pallets or industrial molds during machining or transfer processes, taking advantage of the 50 mm stroke for rapid locking action.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX50 the Right Cylinder?
With a 125 mm bore generating 6136 N of push force at just 0.5 MPa, this cylinder easily handles heavy loads. If your application requires less force, stepping down to a 100 mm bore provides 3927 N at the same pressure, which may be a more efficient choice. Because the stroke is only 50 mm, side-load stress on the rod bearing is minimal, though external guides are always recommended for offset loads.
The SAI125X50 is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders. Match your mounting interface using FA or LB accessories, and note the G1/2 port size. If a load must be held securely without continuous air pressure, do not rely on the air cushion; instead, specify an SAIL variant with an air-released lock or a BSAI clamp-lock cylinder.
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 SAI125 Standard Air Cylinder SAI125AX50 FAQ
At an operating pressure of 0.5 MPa, the SAI125X50 cylinder generates a push force of 6136 N and a pull force of 5734 N. It can reach up to 8590 N push force at 0.7 MPa.
Yes, the SAI125X50 is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 standard cylinders. It serves as a drop-in replacement provided the mounting interface and G1/2 port match your system.
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