Airtac SAI125 Standard Air Cylinder SAI125BX120S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX120S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX120S
The AirTAC SAI125X120-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N and pull force of 5734 N at 0.5 MPa, this 125mm bore actuator handles substantial payloads with precision. The 120mm stroke provides the exact travel needed for mid-range clamping and pressing tasks. As a genuine AirTAC component, it ensures reliable performance in rigorous industrial environments.
This configuration includes a SUS304 stainless steel rod (option B) for superior corrosion resistance and features a built-in magnet (-S) for seamless integration with CMSE or DMSE reed switches. The extruded aluminum barrel includes sensor grooves on both sides, simplifying switch mounting along the stroke length.
Airtac SAI125 Standard Air Cylinder SAI125BX120S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX120S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAI125BX120S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAI125BX120S Is Used
Heavy-Duty Stamping
Provides the 6136 N force required to seat bearings or form metal components in automated stamping presses.
Pallet Stopping
Acts as a high-force stopper block on heavy-load conveyor lines, decelerating packed pallets securely.
Injection Molding Extraction
Utilizes the robust 125mm bore and SUS304 rod to pull heavy molded parts from high-temperature industrial molds.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX120S the Right Cylinder?
Select this 125mm bore when 100mm (3927 N at 0.5 MPa) falls short on thrust but you want to avoid stepping up to the larger 160mm class. Operating speeds for this bore are 30-500 mm/s. Because the stroke is 120mm, side-load stress on the rod bearing is minimal compared to longer strokes, but always ensure the load is guided externally to prevent binding. This cylinder uses a PT G1/2 port. Remember that the standard SAI does not hold position upon air loss; for fail-safe load holding, consider the SAIL variant with an air-released lock or the BSAI clamp-lock cylinder. It serves as a direct drop-in replacement for any ISO 15552 profile cylinder footprint.
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 SAI125BX120S FAQ
At 0.5 MPa, this 125mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N.
Yes, the SAI125X120-S is dimensionally interchangeable per ISO 15552 standards, meaning it matches the mounting footprint and port sizes of other ISO 15552 profile cylinders.
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