Airtac SAI125 Standard Air Cylinder SAI125X450
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X450 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X450
The AirTAC SAI125X450 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering 6136 N of push force at just 0.5 MPa, this 125 mm bore actuator is built for demanding industrial environments. The 450 mm stroke provides extensive travel for material handling and large press operations. As a genuine AirTAC component, it guarantees reliable performance and a standardized mounting interface.
This model features a durable extruded aluminum barrel with sensor grooves machined on both sides for direct CMSE or DMSE switch integration. The standard configuration includes a robust carbon steel piston rod and PT tapered port threads. For applications requiring higher heat resistance, the seal options can be upgraded from standard TPU to Viton (H) or NBR (N). If your machinery demands multi-directional clamping or position holding without continuous air pressure, consider the related BSAI bidirectional clamp-lock variant.
Airtac SAI125 Standard Air Cylinder SAI125X450 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X450 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAI125X450
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAI125X450 Is Used
Heavy-Duty Stamping
Provides the 6136 N push force at 0.5 MPa required to actuate large metal stamping presses and forming dies over a 450 mm travel distance.
Pallet Diversion
Generates enough instantaneous thrust to deflect heavy pallets on high-throughput packaging lines without stalling the conveyor system.
Automated Pressing
Ideal for applying consistent downward pressure in automated assembly lines for heavy industrial components and automotive subassemblies.
Is the Airtac SAI125 Standard Air Cylinder SAI125X450 the Right Cylinder?
Selecting the SAI125X450 is optimal when your application requires substantial thrust that exceeds the 3927 N push force of the smaller 100 mm bore at 0.5 MPa, but you do not need the extreme 10053 N output of the 160 mm version. This 125 mm bore strikes a balance between high force and physical footprint. The 450 mm stroke is a standard dimension, but at this length, side loads can cause severe bending stress on the rod bearing. To prevent premature wear, use an external guide rail or select a guided cylinder variant.
Because this is a double-acting ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, making it a seamless drop-in replacement for standard bore, 450 mm stroke, PT port, and standard mounting accessory configurations. Note that a plain SAI cylinder does not hold its load when air pressure is removed or exhausted; the piston will drift. If fail-safe holding is required, specify the SAIL variant with an air-released lock or install an external rod lock.
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 SAI125X450 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
No, the standard SAI cylinder relies on adjustable air cushions at both ends to decelerate the piston, not to lock it. If pressure is lost, the load will drift or drop. For secure position holding, use the SAIL variant with an air-released lock or an external pilot-operated check valve.
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