Airtac SAI125 Standard Air Cylinder SAI125AX140S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX140S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX140S
The AirTAC SAI125X140-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust push force of 6136 N at 0.5 MPa and a pull force of 5734 N, this 125 mm bore unit is built to drive substantial loads. The 140 mm stroke provides the extended reach needed for high-tonnage clamping, pressing, and lifting tasks without excessive cycle time.
This variant features an integrated magnet (-S) for direct compatibility with CMSE and DMSE sensor switches, which seat cleanly into the dual-side extruded barrel grooves. The piston rod is constructed from SUS420J2 stainless steel (code A) for enhanced corrosion resistance, and fluid is controlled via PT tapered port threads. Adjustable air cushions at both ends absorb end-of-stroke kinetic energy to maximize actuator longevity.
Airtac SAI125 Standard Air Cylinder SAI125AX140S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX140S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAI125AX140S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAI125AX140S Is Used
Heavy-Duty Stamping
Provides the 6136 N push force at 0.5 MPa required to form and stamp thick metal components in automated press lines.
Injection Mold Clamping
Secures large injection molds and heavy industrial fixtures, utilizing the SUS420J2 stainless steel rod to resist environmental corrosion.
Pallet Lifting Stations
Drives robust lifting mechanisms for loaded pallets, relying on adjustable air cushions to safely decelerate 125 mm bore payloads.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX140S the Right Cylinder?
Select this 125 mm bore when 80 mm cylinders fall short of required thrust. An 80 mm SAI generates 2513 N of push force at 0.5 MPa, whereas this 125 mm model outputs 6136 N at the same pressure, making it the correct upgrade for heavy payloads. If your application demands less force and faster cycling, stepping down to a 100 mm bore (3927 N at 0.5 MPa) is advised.
As a true ISO 15552 profile cylinder, this unit serves as a drop-in replacement for any standard 125 mm bore, 140 mm stroke ISO 15552 actuator. It utilizes a G1/2 port and supports standard mounting accessories like FA flanges or TC trunnions. Remember that standard SAI cylinders rely on air pressure to maintain position; if air is lost, the piston will drift. For dead-load holding without live pressure, specify the SAIL (air-released lock) or BSAI (clamp-lock) variant.
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 SAI125AX140S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X140-S is dimensionally interchangeable per ISO 15552. It shares standard mounting interfaces, a G1/2 port, and 140 mm stroke dimensions, allowing it to serve as a drop-in replacement for comparable ISO 15552 profile cylinders.
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