Airtac SAI125 Standard Air Cylinder SAI125AX350
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX350 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX350
The AirTAC SAI125X350 is a double-acting ISO 15552 profile cylinder built for heavy-duty automation. It delivers a robust 6136N push force and 5734N pull force at 0.5 MPa, making it well-suited for high-thrust pressing and heavy load transfer over its 350mm stroke. The extruded aluminum barrel design omits tie rods, providing a clean exterior that resists snagging in dynamic environments.
Configured with an SUS420J2 stainless steel piston rod (material code A), this unit offers excellent corrosion resistance for humid or mildly chemically exposed workspaces. It utilizes PT tapered G1/2 ports and features adjustable air cushions at both ends to absorb end-of-stroke impact. Note that this 125mm bore operates at a controlled speed range of 30-500 mm/s, optimized for moving substantial masses safely.
Airtac SAI125 Standard Air Cylinder SAI125AX350 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX350 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAI125AX350
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAI125AX350 Is Used
Heavy-Duty Pressing
Provides 6136N of thrust at 0.5 MPa for assembling bearings, bushings, and heavy mechanical links in automotive and metal fabrication lines.
Bulk Material Diversion
Utilizes the 350mm stroke to actuate large-scale flap gates or heavy diverter arms on high-capacity conveyor systems handling aggregates or packaged goods.
Pallet Lift Stations
Drives robust lifting mechanisms for loaded pallets, utilizing the SUS420J2 stainless steel rod to withstand washdown environments in food or pharma logistics.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX350 the Right Cylinder?
Select this 125mm bore when 100mm (3927N at 0.5 MPa) is insufficient for your load, but you want to avoid the added mass and slower cycle times of a 160mm cylinder. At 350mm stroke, the unsupported rod length is significant; side loads can cause rod-bearing wear and bending. If your application cannot guarantee pure axial loading, mount the load on external linear guides or switch to a guided cylinder to prevent premature seal failure.
This model provides a true ISO 15552 mounting interface, meaning it serves as a direct dimensional drop-in replacement for other ISO 15552 profile cylinders. It uses PT G1/2 ports and is compatible with FA/FB flanges or TC trunnion brackets. Because this configuration lacks a magnet (-S), position sensing requires external reed or solid-state switches mounted separately, or you must specify the -S option for internal CMSE/DMSE sensor grooves. Remember that standard double-acting cylinders drift if air pressure is lost; use a SAIL variant with an air-released lock or a BSAI clamp-lock for fail-safe load 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 SAI125AX350 FAQ
At 0.5 MPa, the SAI125X350 generates a push force of 6136N and a pull force of 5734N. If operating pressure increases to 0.7 MPa, the push force rises to 8590N.
Yes. The SAI125X350 is a genuine ISO 15552 profile cylinder, meaning its mounting dimensions and pin sizes are interchangeable with other ISO 15552 standard cylinders of the same bore size, allowing for a direct drop-in replacement.
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