Airtac SAI125 Standard Air Cylinder SAI125AX20S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX20S 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 SAI125AX20S
The AirTAC SAI125X20-S is a double-acting ISO 15552 profile cylinder engineered for high-force, short-stroke tasks. It delivers a substantial 6136N push force at 0.5MPa, making it ideal for heavy pressing and clamping operations within a 20mm travel distance. The integrated magnet (-S) enables seamless position feedback using CMSE or DMSE sensor switches.
Built to exacting standards, this variant features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid environments. It utilizes PT tapered port threads and includes adjustable air cushions at both ends to mitigate impact, even over this abbreviated stroke.
Airtac SAI125 Standard Air Cylinder SAI125AX20S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX20S |
|---|---|
| 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 SAI125AX20S
| 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 SAI125AX20S Is Used
Heavy-Duty Stamping
Provides the robust 6136N force necessary for short-travel metal stamping and forming operations.
Industrial Clamping
Ideal for securing heavy workpieces during machining, utilizing its 125mm bore for unwavering hold.
Product Pressing
Executes precise 20mm press fits for bearings and bushings in automated assembly lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX20S the Right Cylinder?
Selecting this 125mm bore cylinder is optimal when an application demands more force than a 100mm bore provides, stepping up from 3927N to 6136N at 0.5MPa. For applications requiring less force, a 100mm bore offers a more compact footprint. Because the 20mm stroke is non-standard and made-to-order, verify your mounting envelope allows for the specific extended and retracted lengths.
As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for other ISO 15552 cylinders without relying on tie-rod construction. Note that a plain SAI cylinder will drift if air pressure is lost; for applications requiring position holding without live pressure, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock.
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 SAI125AX20S FAQ
At an operating pressure of 0.5MPa, the SAI125X20-S generates a push force of 6136N and a pull force of 5734N.
Yes, the SAI125X20-S includes a built-in magnet (-S) and features sensor grooves on both sides of the barrel, allowing direct mounting of CMSE or DMSE series switches.
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Covers non-human-caused product damage.
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