Airtac SAI125 Standard Air Cylinder SAI125X20
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 20mm 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
- Stroke20 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X20
The AirTAC SAI125X20 is a double-acting ISO 15552 profile cylinder engineered for high-force, short-stroke applications. It delivers a robust 6136 N push force at just 0.5 MPa, making it ideal for heavy pressing and clamping operations within confined spaces. The extruded aluminum barrel design omits tie rods, providing a clean exterior that integrates seamlessly into modern machinery.
This specific configuration features a 20 mm stroke, which falls outside the standard 25 mm minimum increment, making it a made-to-order non-standard stroke. It is equipped with a standard carbon steel piston rod and PT (tapered) port threads. For environments requiring elevated temperatures, the cylinder can be specified with Viton (H) seals instead of the standard TPU, ensuring reliable thermal stability.
Airtac SAI125 Standard Air Cylinder SAI125X20 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 20 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 SAI125X20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 SAI125X20 Is Used
Heavy-Duty Stamping
Provides the 6136 N force required for short-stroke metal stamping, forming, and riveting operations in automated fabrication lines.
Industrial Clamping
Ideal for securing heavy workpieces during machining, utilizing its massive clamping force within a highly compact 20 mm stroke envelope.
Press Fit Assembly
Delivers precise, high-force bursts for pressing bearings or pins into housings without requiring excessive axial space.
Is the Airtac SAI125 Standard Air Cylinder SAI125X20 the Right Cylinder?
Selecting this 125 mm bore cylinder is appropriate when your application demands substantial thrust that exceeds the 3927 N (at 0.5 MPa) offered by the 100 mm bore variant, but falls below the 10053 N capacity of the 160 mm size. The 20 mm stroke is optimal for brief, high-impact movements rather than full extension tasks. Because the stroke is exceptionally short, side-load stress on the rod bearing is minimized compared to longer strokes.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, serving as a direct drop-in replacement based on the standard mounting interface. To mount this unit, you can utilize standard ISO accessories like FA or FB flanges, and TC trunnions. Note that this unit does not include a magnet (-S); if your control system requires position feedback, you must specify the -S option to utilize CMSE or DMSE sensors in the dual-side barrel grooves.
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 SAI125X20 FAQ
The SAI125X20 cylinder generates a push force of 6136 N and a pull force of 5734 N at an operating pressure of 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X20 is a genuine ISO 15552 profile cylinder. Its standardized mounting interface and dimensions make it interchangeable with other ISO 15552 cylinders, allowing for a seamless drop-in replacement.
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