Airtac SAI125 Standard Air Cylinder SAI125AX185S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX185S 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 SAI125AX185S
The AirTAC SAI125X185-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N at 0.5 MPa and a pull force of 5734 N. The 185 mm stroke provides substantial extension for high-load material handling. Operating at speeds of 30-500 mm/s, it integrates adjustable air cushions at both ends to absorb impact.
This specific configuration includes a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in humid or washdown environments. The integrated magnet (-S) enables seamless position detection using CMSE or DMSE series switches housed within the dual sensor grooves along the extruded aluminum barrel. Fluid connections use PT tapered thread ports sized at G1/2.
Airtac SAI125 Standard Air Cylinder SAI125AX185S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX185S |
|---|---|
| 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 SAI125AX185S
| 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 SAI125AX185S Is Used
Heavy-Duty Stamping
Provides the 6136 N push force at 0.5 MPa required to actuate large mechanical presses and form rigid metal components.
Pallet Diverting
Uses the 185 mm stroke to push heavy pallets across high-throughput transfer lines without stalling under high friction.
Automotive Assembly
Handles chassis manipulation and heavy component lifting where the SUS420J2 stainless rod resists coolant and washdown fluids.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX185S the Right Cylinder?
Selecting this 125 mm bore cylinder is optimal when a 100 mm bore (offering 3927 N push at 0.5 MPa) cannot move the load, but stepping up to a 160 mm bore (10053 N at 0.5 MPa) would be excessive. The 185 mm stroke avoids the side-load risks of longer extensions, but always ensure the load is guided to prevent rod-bearing wear. Because this is a standard double-acting cylinder, it cannot hold a load if air pressure drops; for fail-safe holding, integrate the SAIL variant with an air-released lock or use an external pilot-operated check valve. As a true ISO 15552 cylinder, it serves as a drop-in replacement for other ISO 15552 profile cylinders, matching the 125 mm bore, 185 mm stroke, G1/2 PT port, and standard mounting accessories like the CA clevis.
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 SAI125AX185S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. If operating at 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X185-S is dimensionally interchangeable per ISO 15552. You can drop it in to replace other ISO 15552 profile cylinders with a 125 mm bore and 185 mm stroke, matching the G1/2 port and mounting interface.
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