Airtac SAI125 Standard Air Cylinder SAI125X50S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X50S
The AirTAC SAI125X50-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a substantial push force of 6136 N at just 0.5 MPa. Its 50 mm stroke is optimal for high-force clamping, riveting, or pressing tasks where compact movement and extreme power are prioritized over long travel distances. The extruded aluminum barrel design omits traditional tie rods, providing a smooth exterior that resists debris accumulation.
Configured with a standard carbon steel piston rod and a built-in magnet (-S), this model is fully compatible with CMSE and DMSE reed switches. The dual sensor grooves machined into both sides of the barrel allow for highly flexible mounting of position-sensing electronics. For environments experiencing elevated thermal conditions, the standard TPU seals can be swapped for Viton (H) variants to maintain structural integrity.
Airtac SAI125 Standard Air Cylinder SAI125X50S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAI125X50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SAI125X50S Is Used
Heavy-Duty Stamping
Generates 8590 N of thrust at 0.7 MPa, making it ideal for forming, bending, or stamping rigid metal components in automated fabrication cells.
Industrial Pressing
The short 50 mm stroke provides rigid, high-impact force for pressing bearings and bushings into housings without deflection.
Pallet Clamping
Delivers the immense holding power needed to secure heavy pallets or industrial molds in place during machining or transfer operations.
Is the Airtac SAI125 Standard Air Cylinder SAI125X50S the Right Cylinder?
Selecting this 125 mm bore cylinder is appropriate when an application demands upward of 6000 N of push force at 0.5 MPa, or an impressive 8590 N at 0.7 MPa. If your setup does not require this magnitude of thrust, stepping down to the 100 mm bore variant is recommended, as it provides 3927 N of push force at 0.5 MPa, thereby saving valuable space and air consumption. The PT tapered port threads ensure a robust, leak-free pneumatic connection directly to your air supply.
Because the stroke is only 50 mm, side-load stress on the rod bearing is naturally minimized compared to longer strokes. However, it is critical to remember that a standard double-acting cylinder does not hold position when air pressure is removed or exhausted; the piston will drift. If your machinery requires true load-holding without continuous live pressure, specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant instead of the standard SAI.
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 SAI125X50S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. If the operating pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X50-S is dimensionally interchangeable per ISO 15552 standards. It can serve as a drop-in replacement for other ISO 15552 profile cylinders using identical mounting accessories like FA flanges or TC trunnions.
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