Airtac SAI125 Standard Air Cylinder SAI125AX375
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX375 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX375
The AirTAC SAI125X375 is a double-acting ISO 15552 profile cylinder built to deliver substantial thrust for heavy-duty automation. It provides 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it well-suited for high-inertia pressing and heavy material handling over its 375 mm stroke. The extruded aluminum barrel design omits tie rods while maintaining strict ISO mounting interchangeability.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid or mildly chemically washed environments. It uses PT tapered port threads and lacks a standard magnet; if position sensing is required, a -S suffix variant with CMSE or DMSE switches must be specified instead.
Airtac SAI125 Standard Air Cylinder SAI125AX375 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX375 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAI125AX375
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAI125AX375 Is Used
Heavy-Duty Stamping
Provides the 6136 N push force required to seat bearings, form thick metal brackets, or stamp heavy industrial components securely.
Pallet Diversion
Uses the 375 mm stroke to push heavy pallets onto secondary packaging lines, absorbing high kinetic energy with its adjustable cushioning.
Plastic Mold Ejection
Delivers reliable high-force ejection of dense molded plastic parts from heavy machinery tooling in automated manufacturing cells.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX375 the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm bore yields a significant jump in capability, moving from 3927 N to 6136 N of push force at 0.5 MPa. Stepping up further to the 160 mm bore provides 10053 N, but adds considerable physical bulk. For this 375 mm stroke, the extended rod is highly susceptible to bending under side loads; utilizing external guide rails or a guided cylinder is strongly recommended to prevent premature rod-bearing wear.
As a standard double-acting cylinder, this model relies on live air pressure to move and hold its load. If the air supply drops or the valve is centered, the piston will drift and cannot maintain position. For fail-safe load holding without continuous pressure, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants. Replacement is straightforward via the ISO 15552 interface, matching 125 mm bore, 375 mm stroke, G1/2 ports, and compatible FA flange or TC trunnion accessories.
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 SAI125AX375 FAQ
At a standard 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X375 is dimensionally interchangeable with other ISO 15552 profile cylinders of the same bore and stroke. It uses G1/2 ports and standard mounting accessories, allowing a direct drop-in replacement without altering the machine frame.
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