Airtac SAI125 Standard Air Cylinder SAI125AX70S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX70S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX70S
The AirTAC SAI125X70-S is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and a 70mm stroke. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for heavy-duty actuation over short distances. The extruded aluminum barrel design eliminates tie-rods, offering a clean, standardized mounting interface that is dimensionally interchangeable with other ISO 15552 cylinders.
This specific configuration includes a magnet for use with CMSE and DMSE position sensors, which seat directly into the dual-side sensor grooves on the barrel. Additionally, it is built with an SUS420J2 stainless steel rod (material code A) for enhanced resistance to corrosion and surface wear in demanding environments. The PT tapered port threads ensure a tight, reliable pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125AX70S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX70S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 70 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 SAI125AX70S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×70 | 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 SAI125AX70S Is Used
Heavy-Duty Pressing
Ideal for applying high downward pressure in assembly jigs, utilizing its 6136 N push force at 0.5 MPa to seat bearings or form components securely.
Pallet Diverter
Provides the necessary muscle to deflect heavy loaded pallets on conveyor lines, using the integrated magnet and CMSE sensors to confirm diversion stroke.
Automated Stamping
Executes short, repetitive stamping operations rapidly, benefiting from the SUS420J2 stainless steel rod's durability against side-impact loads.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX70S the Right Cylinder?
Choose this 125mm bore model when an application demands high thrust that exceeds the 3927 N (at 0.5 MPa) provided by the 100mm bore size, but does not require the extreme 10053 N output of the 160mm variant. The 70mm stroke is optimal for rapid, short-travel clamping or lifting tasks where maintaining momentum over a long distance is unnecessary.
Because this is a standard double-acting cylinder, the adjustable air cushions at both ends only decelerate the piston near the stroke limits. They do not lock or hold the load. If your machinery requires the piston to maintain its position during a complete loss of air pressure, you must integrate an external rod lock or utilize the SAIL (air-released lock) variant. When replacing an existing ISO 15552 cylinder, match the 125mm bore, 70mm stroke, PT G1/2 port, and required mounting accessories (such as a TC trunnion or LB foot).
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 SAI125AX70S FAQ
At a standard operating pressure of 0.5 MPa, this 125mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If the pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X70-S is a genuine ISO 15552 profile cylinder. Its standardized mounting dimensions, 125mm bore, 70mm stroke, and G1/2 port make it dimensionally interchangeable with other ISO 15552 cylinders, allowing for a seamless drop-in replacement.
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