Airtac SAI125 Standard Air Cylinder SAI125AX45
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX45 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX45
The AirTAC SAI125X45 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore unit is built to handle substantial loads. The 45 mm stroke is a non-standard, made-to-order length tailored for short-travel clamping and pressing tasks.
This model features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It utilizes PT tapered port threads and includes adjustable air cushions at both ends to decelerate the massive payload smoothly. Note that a magnet for position sensing is not included in this configuration.
Airtac SAI125 Standard Air Cylinder SAI125AX45 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX45 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAI125AX45
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAI125AX45 Is Used
Heavy-Duty Stamping
Provides the intense short-stroke force required for deforming or stamping metal components in automated production lines.
Pallet Halting
Acts as a high-strength stopper block for heavy pallets, using its 6136 N capacity to arrest momentum reliably.
Industrial Clamping
Secures large castings or welded frames during machining operations, ensuring zero movement under cutting forces.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX45 the Right Cylinder?
Select this 125 mm bore when 100 mm cylinders fall short—the SAI100 provides 3927 N at 0.5 MPa, whereas this SAI125 yields 6136 N. The 45 mm stroke is ideal for high-force, short-distance operations. Because this is a non-standard stroke, expect a made-to-order lead time.
If your fixture requires holding a load vertically without continuous air pressure, a standard SAI will drop; integrate the SAIL locking variant or an external pilot check valve. For ISO 15552 drop-in replacements, match the 125 mm bore, 45 mm stroke, PT G1/2 ports, and appropriate mounting accessories like the TC trunnion.
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 SAI125AX45 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X45 is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders with a 125 mm bore, matching the G1/2 port and mounting dimensions.
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