Airtac SAI125 Standard Air Cylinder SAI125X70S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X70S 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 SAI125X70S
The AirTAC SAI125X70-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a robust push force of 6136 N at 0.5 MPa. Its 70 mm stroke provides concise extension for high-force clamping and holding tasks.
This variant includes a standard magnet for position sensing and utilizes a carbon steel piston rod. The extruded aluminum barrel features dual sensor grooves, allowing seamless integration of CMSE or DMSE switches without requiring additional mounting brackets.
Airtac SAI125 Standard Air Cylinder SAI125X70S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X70S |
|---|---|
| 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 SAI125X70S
| 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 SAI125X70S Is Used
Heavy-Duty Stamping
Provides the intense 6136 N push force required to form and stamp thick metal components in automated presses.
Industrial Clamping
Secures large castings or heavy machinery frames during machining operations using its short 70 mm power stroke.
Plastic Injection Molding
Drives substantial ejection pins to release dense, oversized molded plastic parts from heavy tooling.
Is the Airtac SAI125 Standard Air Cylinder SAI125X70S the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (providing 3927 N at 0.5 MPa) cannot meet your load requirements, but you want to avoid the larger footprint of a 160 mm cylinder. The 70 mm stroke is optimal for short, high-power movements.
For applications requiring the load to remain securely in place during a loss of air pressure, a standard SAI cylinder will drift. In those scenarios, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock. As a true ISO 15552 profile cylinder, this model serves as a drop-in replacement matching the standard 125 mm bore dimensions, G1/2 PT port, and standard mounting accessories.
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 SAI125X70S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X70-S is built to ISO 15552 dimensional standards, making it interchangeable with other standard profile cylinders of the same bore size. It uses a G1/2 PT port and standard mounting accessories.
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