Airtac SAI125 Standard Air Cylinder SAI125BX180S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX180S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX180S
The AirTAC SAI125X180-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a substantial push force of 8590 N and a pull force of 5734 N at 0.7 MPa, making it well-suited for high-thrust actuation over its 180 mm stroke. As a tie-rod-less extruded aluminum profile barrel design, it offers a clean, standardized mounting interface that drops in seamlessly with other ISO 15552 cylinders.
This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance in harsh environments. It is equipped with a magnetic piston (-S) to integrate directly with CMSE and DMSE series sensor switches, which ride neatly in the dual side grooves of the barrel. The pneumatic ports feature PT tapered threads, and the cylinder incorporates adjustable air cushions at both ends to manage the energy of large moving masses.
Airtac SAI125 Standard Air Cylinder SAI125BX180S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX180S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAI125BX180S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAI125BX180S Is Used
Heavy-Duty Stamping
Provides the 8590 N force necessary to actuate mechanical stamping and forming presses, driving robust tooling with consistent power over a 180 mm stroke.
Automotive Assembly Jigs
Ideal for positioning heavy chassis or powertrain components on the line, utilizing the SUS304 rod to withstand minor splashes of cutting fluids or lubricants.
Pallet Diverting
Pushes fully loaded pallets off high-throughput conveyor lines, relying on the adjustable air cushions to decelerate the massive 125 mm piston smoothly.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX180S the Right Cylinder?
Selecting this 125 mm bore cylinder is ideal when an application demands over 8000 N of thrust at 0.7 MPa, stepping up significantly from the 63 mm bore class which provides 2182 N. If your system requires less force, dropping down to an 80 mm bore yields 3518 N, avoiding unnecessary air consumption. The 180 mm stroke is well within the 1500 mm maximum standard limit, keeping the assembly compact while providing ample travel.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure is lost or exhausted; the piston will drift. For gravity-loaded vertical applications requiring fail-safe holding, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants instead. To ensure a perfect ISO 15552 replacement, verify the 125 mm bore, 180 mm stroke, PT G1/2 ports, and your required mounting accessory—such as an FA flange or TC trunnion—alongside the -S magnet option.
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 SAI125BX180S FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates a push (extend) force of 8590 N and a pull (retract) force of 5734 N. At 0.5 MPa, the push force is 6136 N.
Yes. The SAI series is built to the ISO 15552 standard, meaning its mounting dimensions and footprint are fully interchangeable with other ISO 15552 profile cylinders of the same bore size. Simply match your existing bore, stroke, and mounting accessories.
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