Airtac SAI125 Standard Air Cylinder SAI125X475S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X475S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X475S
The AirTAC SAI125X475-S is a double-acting profile cylinder built to the ISO 15552 mounting interface, making it a drop-in replacement for other ISO 15552 cylinders. Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this 125 mm bore model is designed for heavy-duty positioning tasks.
This 475 mm stroke variant includes an integrated magnet for use with CMSE and DMSE sensor switches, which ride neatly in the extruded aluminum barrel's dual side grooves. The standard carbon steel piston rod provides robust resistance to industrial wear, while the adjustable air cushions at both ends ensure smooth deceleration of large moving masses.
Airtac SAI125 Standard Air Cylinder SAI125X475S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X475S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAI125X475S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAI125X475S Is Used
Heavy Machinery Forming
Provides the 6136 N push force at 0.5 MPa required to actuate heavy press dies and forming assemblies in metal fabrication lines.
Pallet Diverting
The 475 mm stroke and integrated -S magnet allow for precise, sensor-verified diversion of large pallets in high-throughput packaging systems.
Automotive Component Handling
Ideal for lifting and transferring heavy automotive sub-components, utilizing the dual air cushions to prevent shock loads at stroke ends.
Is the Airtac SAI125 Standard Air Cylinder SAI125X475S the Right Cylinder?
Select this 125 mm bore when an 80 mm bore falls short—offering 3518 N push at 0.5 MPa versus the 80 mm's 2513 N. For applications needing even more power, stepping up to a 160 mm bore provides 10053 N of push force. Because this model features a 475 mm stroke, the extended piston rod is susceptible to bending under side loads; utilizing an external guide rail or a guided cylinder is strongly recommended to prevent premature rod-bearing wear.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting accessories like FA flanges or TC trunnions. The PT tapered port thread and G3/8 air supply port match the standard 125 mm bore configuration. Note that while the adjustable cushions decelerate the piston, this cylinder will not hold a load if air pressure drops—use the SAIL or BSAI variants if fail-safe locking is required.
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 SAI125X475S FAQ
At 0.5 MPa, 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 SAI125X475-S is a profile cylinder dimensionally interchangeable per ISO 15552, meaning it matches standard mounting footprints and accessories without requiring machine modifications.
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