Airtac SAI125 Standard Air Cylinder SAI125AX185
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX185 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX185
The AirTAC SAI125X185 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 8590 N and a pull force of 5734 N at 0.7 MPa. The 185 mm stroke is optimal for moving substantial loads through mid-range work cycles. This unit features a SUS420J2 stainless steel piston rod for enhanced corrosion resistance compared to standard carbon steel.
As a true ISO 15552 standardized cylinder, it offers a drop-in replacement solution for existing mounting interfaces. The extruded aluminum barrel includes dual sensor grooves, although this specific configuration does not include a magnet. For applications requiring position holding without continuous air pressure, consider the SAIL or BSAI locking variants.
Airtac SAI125 Standard Air Cylinder SAI125AX185 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX185 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 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 SAI125AX185
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×185 | 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 SAI125AX185 Is Used
Heavy Machinery Forming
Provides the 8590 N push force necessary to actuate heavy forming presses and large industrial clamping fixtures.
Pallet Diverting
Drives robust routing arms on high-capacity conveyor lines, utilizing the 185 mm stroke to redirect heavy pallets.
Automated Welding Indexing
Positions large welding assemblies with high repeatability, benefiting from the SUS420J2 stainless steel rod in demanding environments.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX185 the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when 8590 N of thrust at 0.7 MPa is required. If your application demands less force, stepping down to the 100 mm bore yields 5497 N of push force, while the larger 160 mm bore provides 14074 N for heavier loads. Because this model lacks a magnet, position sensing requires external switches or a custom -S suffix configuration.
This unit utilizes PT tapered port threads and operates efficiently within a speed range of 30-500 mm/s. Remember that the integrated adjustable air cushions only decelerate the piston at stroke ends; they do not function as a braking mechanism to hold loads vertically during a loss of air pressure.
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 SAI125AX185 FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates a push force of 8590 N and a pull force of 5734 N. At 0.9 MPa, the push force increases to 11045 N.
Yes, the SAI125X185 is dimensionally interchangeable per ISO 15552 standards. You can drop it into existing mounts using standard accessories like FA flanges or TC trunnions, matching the 125 mm bore and 185 mm stroke.
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