Airtac SAI125 Standard Air Cylinder SAI125BX25S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX25S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX25S
The AirTAC SAI125X25-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty tasks, providing a substantial push force of 6136 N and a pull force of 5734 N at 0.5 MPa. Its short 25 mm stroke makes it highly effective for high-force clamping and pressing operations where minimal travel distance is required. The extruded aluminum barrel design omits tie rods, presenting a clean exterior that is dimensionally interchangeable per ISO 15552 standards.
This specific configuration features a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a built-in magnet (-S) for seamless position sensing. The barrel incorporates sensor grooves on both sides to accommodate CMSE and DMSE switches. Fluid ports utilize a PT tapered thread type, and the unit relies on adjustable air cushions at both ends to manage impact deceleration within its 30-500 mm/s operating speed range.
Airtac SAI125 Standard Air Cylinder SAI125BX25S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX25S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAI125BX25S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAI125BX25S Is Used
Heavy-Duty Stamping
Generates 6136 N of thrust at 0.5 MPa, ideal for short-stroke metal forming and stamping tasks.
Pallet Halting
Acts as a high-power stopper for heavy pallets on conveyor lines, utilizing its 5734 N pull force.
Industrial Clamping
Secures large welded assemblies during machining, taking advantage of the robust 125 mm bore profile.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX25S the Right Cylinder?
Selecting this 125 mm bore model is appropriate when an application demands over 6000 N of force at 0.5 MPa, stepping up significantly from the 80 mm bore which yields 2513 N. If the 6136 N output exceeds your requirement, dropping to a 100 mm bore provides 3927 N while saving physical footprint. Because this is a short 25 mm stroke, side-load stress on the rod bearing is minimal compared to longer units.
For applications requiring the load to be held mechanically without continuous air pressure, a standard SAI cylinder will drift upon pressure loss. In such scenarios, integrate the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock to secure the load safely. This model serves as a direct drop-in replacement for other ISO 15552 profile cylinders sharing the same 125 mm bore, 25 mm stroke, PT G1/2 port, and mounting dimensions.
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 SAI125BX25S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X25-S is dimensionally interchangeable per ISO 15552 profile cylinder standards. You can use it as a drop-in replacement for other ISO 15552 cylinders with matching 125 mm bore, 25 mm stroke, and G1/2 port specifications.
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