Airtac SAI125 Standard Air Cylinder SAI125AX120S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX120S 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 SAI125AX120S
The AirTAC SAI125X120-S is a double-acting profile cylinder built to ISO 15552 dimensional standards, making it a drop-in replacement for other ISO 15552 cylinders. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force, placing it in the heavy-duty class for high-inertia automation tasks. The 120 mm stroke is a non-standard, made-to-order length tailored for specific mid-stroke machinery movements.
This specific configuration includes a -S magnet for direct mounting of CMSE or DMSE sensor switches along the dual extruded barrel grooves. It features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance over standard carbon steel, and utilizes PT tapered port threads for a robust pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125AX120S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX120S |
|---|---|
| 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 SAI125AX120S
| 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 SAI125AX120S Is Used
Heavy Machinery Forming
Provides the robust 6136 N push force at 0.5 MPa required to actuate large forming presses and heavy-duty stamping equipment.
Pallet Transfer Stops
Uses the 120 mm made-to-order stroke to deploy heavy-duty stopper blades in high-mass pallet conveyor lines.
Automated Welding Clamps
The SUS420J2 stainless steel rod offers better resistance to weld spatter and shop floor moisture than standard carbon steel.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX120S the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) is insufficient to move your load, but you want to avoid stepping up to a 160 mm frame that demands 10053 N of force and more physical space. The 120 mm stroke provides a compact extension where standard 100 mm or 125 mm options do not fit the exact kinematic requirement.
Because this is a non-standard 120 mm stroke, ensure your cad models reflect the exact extended and retracted lengths. Note that the standard adjustable air cushions only decelerate the piston near the end caps; they do not lock the rod. If the application requires the load to be held in place during a loss of air pressure, integrate an external pilot-operated check valve or specify the SAIL (air-released lock) variant instead of relying on the base SAI.
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 SAI125AX120S FAQ
At a standard 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
Yes, the SAI profile barrel is dimensionally interchangeable per ISO 15552. You can swap it into existing ISO 15552 mounting interfaces using the standard G1/2 port and appropriate FA, FB, or TC mounting accessories.
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