Airtac SAI125 Standard Air Cylinder SAI125BX170S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX170S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX170S
The AirTAC SAI125X170-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, this 125 mm bore unit is built to execute demanding linear motion tasks. The 170 mm stroke provides substantial extension for pressing, clamping, and lifting assemblies. As a genuine extruded aluminum profile barrel design, it omits tie-rods for a clean exterior while maintaining strict dimensional interchangeability with other ISO 15552 cylinders.
This specific configuration includes a SUS304 stainless steel piston rod (code B) for superior corrosion resistance in harsh or washdown environments. It is equipped with a magnet (-S) enabling direct mounting of CMSE or DMSE reed switches along the dual sensor grooves. Fluid connections use a PT tapered thread (G1/2 port) to ensure a positive, leak-free seal under high dynamic pressure.
Airtac SAI125 Standard Air Cylinder SAI125BX170S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX170S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAI125BX170S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAI125BX170S Is Used
Heavy-Duty Stamping
Provides the high thrust required for metal forming, riveting, and stamping operations in automated fabrication cells.
Pallet Clamping
Secures heavy industrial pallets and fixtures during machining or welding processes, utilizing the full 6136 N force at 0.5 MPa.
Press Assembly
Drives robust press-fit operations for bearings and bushings, taking advantage of the precise 170 mm stroke and stable profile barrel.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX170S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when the 80 mm bore class (providing 2513 N at 0.5 MPa) is insufficient for your load requirements, but you want to avoid jumping to the massive 160 mm class (10053 N at 0.5 MPa). The 170 mm stroke is well below the 1500 mm maximum standard, keeping the rod bearing stress low and eliminating the need for external guide rails to prevent rod bending.
For applications requiring position holding during a complete loss of air pressure or valve centering, note that the standard adjustable air cushions only decelerate the piston near the stroke ends and do not function as a mechanical brake. To secure a suspended load safely without live pressure, specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant instead of the standard SAI. This model is a direct drop-in replacement per ISO 15552 mounting dimensions, utilizing a PT G1/2 port and supporting TC, FA, or LB mounting accessories.
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 SAI125BX170S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X170-S is manufactured to strict ISO 15552 dimensional standards, making it a drop-in replacement for other ISO 15552 profile cylinders using identical mounting interfaces and G1/2 ports.
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