Airtac SAI125 Standard Air Cylinder SAI125AX475
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX475 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX475
The AirTAC SAI125X475 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore unit handles substantial loads across its 475 mm stroke. The extruded aluminum barrel omits tie-rods, providing a clean profile that drops directly into standardized ISO 15552 mounting interfaces.
Equipped with a SUS420J2 stainless steel piston rod, this variant offers enhanced corrosion resistance compared to standard carbon steel. It operates at speeds of 30-500 mm/s and features adjustable air cushions at both ends to absorb kinetic energy. Note that for applications requiring mid-stroke locking upon air loss, the SAIL or BSAI variants are required instead of the standard model.
Airtac SAI125 Standard Air Cylinder SAI125AX475 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX475 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAI125AX475
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAI125AX475 Is Used
Heavy Stamping Presses
Provides the 6136 N push force at 0.5 MPa required to actuate heavy forming dies and stamping assemblies in metal fabrication facilities.
Pallet Diverters
Uses the 475 mm stroke to push heavy loaded pallets from primary roller conveyors onto secondary packaging lines without hesitation.
Large Mold Handling
Shifts substantial injection molds or tooling fixtures into and out of machining centers, relying on the rigid ISO 15552 mounting interface.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX475 the Right Cylinder?
Select this 125 mm bore when 80 mm cylinders (providing 2513 N push at 0.5 MPa) cannot move the load, but a 160 mm bore is physically too large. The 475 mm stroke provides ample extension for material handling, but because the stroke exceeds 300 mm, side loads can cause severe rod-bearing bending. Utilize external guide rails or a guided cylinder carriage to prevent premature seal wear and piston rod damage.
This model features PT tapered port threads and uses an M27x2 rod thread. Because it lacks a magnet (-S), it cannot host CMSE or DMSE reed switches for position sensing; choose an SAI125X475-S if electronic position feedback is required. To hold a load securely without continuous live air pressure, integrate an external pilot-operated check valve or specify the BSAI clamp-lock series.
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 SAI125AX475 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X475 is dimensionally interchangeable per ISO 15552. It shares identical mounting dimensions with other ISO 15552 cylinders, allowing it to serve as a drop-in replacement without altering the machine frame.
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