Airtac SAI125 Standard Air Cylinder SAI125X300
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X300 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X300
The AirTAC SAI125X300 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for moving substantial loads over a 300 mm stroke. The extruded aluminum barrel design omits tie rods, ensuring a clean exterior that drops directly into standard ISO 15552 mounting footprints.
This configuration features a standard carbon steel piston rod and PT tapered port threads. For environments requiring heat resistance, you can specify Viton (H) seals instead of the standard TPU to handle higher operating temperatures. If your machinery needs multi-position stopping or clamping without continuous air pressure, the SAIL or BSAI variants offer integrated mechanical locking.
Airtac SAI125 Standard Air Cylinder SAI125X300 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X300 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 SAI125X300
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | 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 SAI125X300 Is Used
Heavy Stamping
Provides the high 6136 N push force required to actuate large stamping presses and form rigid metal components over a 300 mm travel distance.
Injection Molding
Extracts heavy molded parts from large injection molding machines, utilizing the robust 125 mm bore to overcome ejection resistance.
Pallet Diversion
Pushes fully loaded pallets onto branching conveyor lines, where the substantial thrust and 300 mm stroke ensure complete transfer.
Is the Airtac SAI125 Standard Air Cylinder SAI125X300 the Right Cylinder?
Select this 125 mm bore when a 100 mm cylinder (offering 3927 N push at 0.5 MPa) lacks the thrust for your application, but a 160 mm bore is physically too large. The 300 mm stroke requires careful attention to mechanical alignment. At this length, the unsupported rod is susceptible to bending under side loads; utilize an external guide rail or a guided cylinder to prevent premature rod-bearing wear.
This model uses a G1/2 port and operates at speeds of 30-500 mm/s. Because it is a standard double-acting cylinder, it will not hold a load if air pressure drops. For position holding, integrate an external pilot-operated check valve or select the SAIL lock variant. Replacement is straightforward: match the 125 mm bore, 300 mm stroke, and desired mounting accessory 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 SAI125X300 FAQ
At an operating pressure of 0.5 MPa, 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 SAI125X300 is dimensionally interchangeable per ISO 15552. You can drop it into existing footprints using standard mounting accessories, provided you match the G1/2 port and 300 mm stroke.
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