Airtac SAI125 Standard Air Cylinder SAI125AX125S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX125S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX125S
The AirTAC SAI125X125-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust push force of 6136 N at 0.5 MPa, this 125 mm bore unit is built to drive substantial loads through its 125 mm stroke. The extruded aluminum barrel design omits tie-rods, providing a sleek, standardized housing that drops directly into ISO 15552 mounting interfaces.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid or mildly chemically washed environments. Equipped with a standard magnet (-S), the cylinder integrates seamlessly with CMSE and DMSE reed switches fitted into the dual sensor grooves molded along the barrel sides. PT tapered port threads ensure a positive, progressive seal during pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125AX125S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX125S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAI125AX125S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAI125AX125S Is Used
Heavy-Duty Stamping
Provides the 6136 N push force at 0.5 MPa required to seat bearings, stamp thick gauge metal, or form rigid components securely.
Pallet Diverting
Drives robust routing arms on high-mass conveyor lines, utilizing the 125 mm stroke to push heavy pallets onto secondary processing tracks.
Plastic Mold Ejection
Ejects dense plastic injection molded parts from heavy tooling, relying on the SUS420J2 rod to resist cooling water and humid plant environments.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX125S the Right Cylinder?
Select this 125 mm bore when an application demands more thrust than the 100 mm class (which provides 3927 N at 0.5 MPa) but does not require the massive 160 mm frame (10053 N at 0.5 MPa). The 125 mm stroke offers a compact 125 mm extension distance, keeping the overall envelope short for tight machine cells. Because the SAI is a double-acting cylinder, it relies entirely on live air pressure to direct motion in both directions.
If a machine sequence loses air pressure or the control valve centers, this cylinder cannot hold its load in place—the piston will drift. For vertical loads or critical stop-and-hold operations, integrate an external pilot-operated check valve or specify the AirTAC SAIL (air-released lock) variant. For replacements, verify the 125 mm bore, 125 mm stroke, PT G1/2 port, and your required mounting accessory (such as FA flange or TC trunnion) to ensure a true ISO 15552 interchange.
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 SAI125AX125S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. If operating pressure increases to 0.7 MPa, the push force reaches 8590 N.
Yes. The SAI125X125-S is a genuine AirTAC profile cylinder built to ISO 15552 dimensional standards, making it interchangeable with other ISO 15552 cylinders of the same 125 mm bore and 125 mm stroke, provided the PT G1/2 port and mounting match.
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