Airtac SAI125 Standard Air Cylinder SAI125AX40S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX40S
The AirTAC SAI125X40-S is a double-acting ISO 15552 profile cylinder engineered for high-force tasks, delivering a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. Its short 40 mm stroke provides rapid, high-impact actuation for heavy clamping or pressing duties.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance and structural rigidity. It is factory-fitted with a magnet (-S), allowing seamless integration with CMSE and DMSE sensor switches housed in the dual-side grooves of the extruded aluminum barrel.
Airtac SAI125 Standard Air Cylinder SAI125AX40S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAI125AX40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SAI125AX40S Is Used
Heavy Stamping
Executes high-force, short-stroke stamping and marking operations on thick metal sheets, utilizing 6136 N of thrust at just 0.5 MPa.
Robotic Grippers
Drives large-scale robotic clamping jaws that require rapid, heavy-duty actuation to secure bulky industrial components during machining.
Press Fitting
Delivers concentrated impact force to press bearings, bushings, and pins into heavy housings without requiring a full hydraulic system.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX40S the Right Cylinder?
Choose this 125 mm bore when 100 mm (3927 N push at 0.5 MPa) is insufficient for your workload, but before stepping up to the massive 160 mm class. The short 40 mm stroke minimizes rod-bearing bending under heavy eccentric loads, though external guides are always recommended for precise pressing alignment.
As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a direct drop-in replacement for other ISO 15552 standard cylinders. It utilizes a PT tapered G1/2 port, supports TC or FA mounting accessories, and requires no special adapters for standardized ISO footprints. Note that this standard cylinder relies on air pressure to maintain position; it will drift if pressure is lost, so consider the SAIL variant if your application requires a mechanical 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 SAI125AX40S FAQ
At a 0.5 MPa operating pressure, the SAI125X40-S 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.
No, the standard SAI cylinder uses adjustable air cushions to decelerate the piston at stroke ends, but it cannot hold a load without live air pressure. For vertical load-holding, use the SAIL (air-released lock) variant or an external rod lock.
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