Airtac SAI125 Standard Air Cylinder SAI125X45
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X45 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X45
The AirTAC SAI125X45 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty positioning tasks. Delivering a robust push force of 6136 N at 0.5 MPa, this 125 mm bore unit is tailored for short-stroke clamping and high-thrust actuation. The extruded aluminum barrel design omits tie rods, providing a clean exterior that simplifies mounting and sensor placement.
This specific configuration features a standard carbon steel piston rod and PT tapered port threads. Because a magnet is not specified, it operates without electronic position feedback. For environments requiring elevated temperature resistance up to 70 C, the standard TPU seals can be swapped for Viton (H) or NBR (N) alternatives during customization.
Airtac SAI125 Standard Air Cylinder SAI125X45 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X45 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAI125X45
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAI125X45 Is Used
Heavy-Duty Stamping
Provides the intense 6136 N push force required to form and stamp thick metal components in automated fabrication lines.
Pallet Halting
Acts as a high-strength stopper block for heavy pallets, using its 45 mm stroke to rapidly arrest momentum on assembly conveyors.
Industrial Clamping
Secures large castings or heavy machinery frames during machining operations, ensuring zero movement under cutting loads.
Is the Airtac SAI125 Standard Air Cylinder SAI125X45 the Right Cylinder?
Choose this 125 mm bore when 80 mm cylinders (providing 2513 N at 0.5 MPa) lack the necessary thrust for moving heavy payloads. The 45 mm stroke is optimal for compact, high-force operations where full extension happens rapidly. If your workflow requires the piston to maintain its position after a compressed air loss, note that the standard SAI does not lock; you should specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock instead.
As a dimensionally interchangeable ISO 15552 cylinder, this model serves as a drop-in replacement for other standard profile cylinders with identical 125 mm bores. Ensure your setup utilizes the G1/2 port, M27x2 rod thread, and appropriate mounting accessories like the CA clevis or TC trunnion to match the ISO interface.
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 SAI125X45 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X45 is built to the ISO 15552 dimensional standard, making it a drop-in replacement for other profile cylinders with the same 125 mm bore and mounting interface. Always verify that your port size (G1/2) and rod thread (M27x2) match the existing plumbing.
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