Airtac SAI125 Standard Air Cylinder SAI125AX275S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX275S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX275S
The AirTAC SAI125X275-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N at 0.5 MPa, making it well-suited for demanding pressing and lifting tasks over its 275 mm stroke. The extruded aluminum barrel eliminates tie-rods, providing a clean profile that drops directly into standardized ISO 15552 mounting footprints.
This specific configuration includes a -S magnet for direct mounting of CMSE or DMSE reed switches along the dual sensor grooves. It is built with an SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. Fluid compatibility is limited to filtered 40 um air, operating reliably between -20 and +70 C.
Airtac SAI125 Standard Air Cylinder SAI125AX275S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX275S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 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 SAI125AX275S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 SAI125AX275S Is Used
Heavy-Duty Pressing
Applies 6136 N of thrust at 0.5 MPa to seat bearings and assemble interference-fit components securely.
Material Forming
Provides consistent clamping force for light metal bending and plastic injection mold holding applications.
Pallet Lifting
Raises heavy product pallets using the 275 mm stroke, utilizing the integrated magnet for precise position feedback.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX275S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when 80 mm bore models (providing 2513 N push at 0.5 MPa) lack the necessary thrust, but a 160 mm bore (10053 N) would be excessive. The 275 mm stroke falls below the 1500 mm standard maximum, keeping the assembly compact. Because the stroke is under 300 mm, rod-bearing bending stress is minimal, though external guides should still be used for heavy off-center loads.
This model uses PT tapered port threads and operates at speeds of 30-500 mm/s. If your machinery requires the piston to maintain its position after a loss of air pressure, note that the standard adjustable air cushions only decelerate the rod at stroke ends. For true load-holding, integrate 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 SAI125AX275S FAQ
At 0.5 MPa operating pressure, 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 SAI125X275-S is dimensionally interchangeable per ISO 15552. It serves as a drop-in replacement for other ISO 15552 profile cylinders, matching standard mounting dimensions and accessory interfaces.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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