Airtac SAI125 Standard Air Cylinder SAI125BX325S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX325S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX325S
The AirTAC SAI125X325-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore actuator is built to manage substantial loads over its 325 mm stroke. The extruded aluminum barrel design omits traditional tie rods, providing a smooth, standardized mounting interface that drops directly into existing ISO 15552 machinery footprints.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh or washdown environments. The integrated magnet (-S) enables seamless position detection using CMSE or DMSE sensor switches fitted into the dual side grooves on the barrel. Fluid ports feature PT tapered threading, and the unit supports adjustable air cushions at both ends to decelerate high kinetic energy loads smoothly.
Airtac SAI125 Standard Air Cylinder SAI125BX325S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX325S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAI125BX325S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAI125BX325S Is Used
Heavy-Duty Stamping
Provides the robust 6136 N push force at 0.5 MPa required to actuate large mechanical presses and form heavy-gauge metal components.
Pallet Diverting
Utilizes the 325 mm stroke to push heavy pallets or totes smoothly across high-throughput logistics conveyor lines.
Automated Assembly Lifts
Lifts substantial sub-assemblies or engine blocks during multi-stage manufacturing, relying on the SUS304 rod for durability in oily environments.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX325S the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm variant is necessary when the 100 mm bore's 3927 N push force at 0.5 MPa is insufficient for your application. If you require less force, stepping down to the 100 mm bore optimizes air consumption and cycle speed. The 325 mm stroke provides extended travel for material handling, but at this length, the unsupported piston rod is highly susceptible to bending under side loads. To prevent premature seal wear and rod bearing failure, use an external guide rail or select a fully guided cylinder to absorb lateral forces.
This model serves as a dimensionally interchangeable drop-in replacement for any standard ISO 15552 cylinder with a 125 mm bore, 325 mm stroke, and G1/2 ports. Mounting flexibility is vast, supporting FA/FB flanges, CA/CB clevises, and TC trunnion brackets. If your machinery requires the load to stay fixed without constant air pressure, remember that the standard SAI cylinder will drift; you must specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock for secure position holding.
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 SAI125BX325S 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 SAI125X325-S is a profile cylinder built to exact ISO 15552 mounting dimensions, making it a drop-in replacement for other ISO 15552 standard cylinders with a 125 mm bore, 325 mm stroke, and G1/2 ports.
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