Airtac SAI125 Standard Air Cylinder SAI125BX115S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX115S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX115S
The AirTAC SAI125X115-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, it is built to drive demanding industrial loads. The 115 mm stroke provides optimal travel for clamping, lifting, and press operations. This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance in harsh environments. It features PT tapered ports and an integrated magnet for CMSE/DMSE sensor switches.
As a genuine ISO 15552 profile barrel design, it offers a dimensionally interchangeable mounting interface for seamless drop-in replacements. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. For applications requiring multi-directional locking without continuous air pressure, consider the related BSAI bidirectional clamp-lock variant.
Airtac SAI125 Standard Air Cylinder SAI125BX115S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX115S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAI125BX115S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAI125BX115S Is Used
Heavy-Duty Stamping
Provides the 6136 N force at 0.5 MPa needed to form and stamp metal components securely within short-stroke tooling.
Pallet Clamping
Secures heavy pallets and large workpieces during machining or transfer operations, utilizing the robust 125 mm bore output.
Injection Mold Ejection
Drives heavy mold ejection plates with reliable force, using the SUS304 rod to resist cooling fluid corrosion.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX115S the Right Cylinder?
Select this 125 mm bore cylinder when your application requires significantly more thrust than a 100 mm bore can provide, which tops out at 3927 N at 0.5 MPa. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N while saving valuable space. The 115 mm stroke is well-suited for short, high-force movements. Because the stroke is under 300 mm, side-load bending stress on the rod bearing is minimized, though external guides are always recommended for offset loads.
This model's PT tapered port threads must be matched with appropriate fittings to ensure a leak-free seal. If your machinery requires true position holding during a complete loss of air pressure, note that the standard adjustable air cushions only decelerate the piston at stroke end and do not function as a brake. For secure load holding, specify the SAIL variant with an air-released lock or utilize an external pilot-operated check valve.
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 SAI125BX115S FAQ
At 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.
Yes. The SAI series features a standard ISO 15552 profile barrel and mounting interface, making it dimensionally interchangeable with other ISO 15552 cylinders. You can use standard FA, FB, or TC mounting accessories.
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