Airtac SAI125 Standard Air Cylinder SAI125AX85
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX85 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX85
The AirTAC SAI125X85 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 short-stroke clamping and high-load pressing tasks. The 85 mm stroke offers precise movement in compact machinery setups.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance in humid environments. It utilizes PT tapered port threads and operates without a magnet. The extruded aluminum barrel includes dual sensor grooves, allowing for easy integration of CMSE or DMSE switches if position feedback is added later.
Airtac SAI125 Standard Air Cylinder SAI125AX85 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX85 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SAI125AX85
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SAI125AX85 Is Used
Heavy-Duty Stamping
Provides the 6136 N force required to form, stamp, or mark thick metal components in automated fabrication lines.
Pallet Halting
Acts as a robust stopper for heavy pallets on assembly conveyors, using its 85 mm stroke to block and release large loads safely.
Industrial Clamping
Secures large molds or heavy workpieces during machining operations, ensuring rigid holding under high vibration.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX85 the Right Cylinder?
Select this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) cannot generate enough force for your application. If the 6136 N output exceeds your requirement, stepping down saves space and air consumption. The 85 mm stroke keeps the rod fully supported, minimizing side-load bending concerns.
This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other standard profile cylinders. Match your mounting hardware using accessories like the CA clevis or TC trunnion. Note that a standard SAI does not hold its position if air pressure is lost; for dead-load holding, consider the SAIL locking variant or an external pilot check valve.
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 SAI125AX85 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 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 SAI125X85 is a genuine ISO 15552 profile cylinder. Its standardized mounting dimensions make it interchangeable with other ISO 15552 cylinders, allowing for seamless drop-in replacement using existing FA flanges or LB foot brackets.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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