Airtac SAI125 Standard Air Cylinder SAI125BX35
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX35 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX35
The AirTAC SAI125X35 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for short, high-impact movements like clamping or heavy pressing. Its 35 mm stroke keeps the overall footprint compact while delivering massive thrust.
Built with an extruded aluminum barrel, this model features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh or washdown environments. It uses PT tapered port threads and lacks a standard magnet, but the barrel retains dual-sided sensor grooves for future CMSE or DMSE switch integration if needed.
Airtac SAI125 Standard Air Cylinder SAI125BX35 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX35 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 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 SAI125BX35
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | 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 SAI125BX35 Is Used
Heavy Duty Stamping
Generates 8590 N of push force at 0.7 MPa, ideal for short-stroke metal forming and riveting tasks.
Industrial Clamping
Secures large fabricated weldments or heavy castings during machining operations using a 35 mm stroke.
Pallet Diverting
Acts as a high-power stopper or diverter arm in high-mass material handling lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX35 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (offering 3927 N push at 0.5 MPa) cannot generate enough holding or pressing power. If the 35 mm stroke is insufficient for your process, step up to a standard 50 mm stroke. Because the stroke is short, rod-bearing bending is negligible, but always ensure the mounting accessory (like an FA flange or CA clevis) matches your load trajectory.
This standard SAI variant relies entirely on live air pressure to maintain its position. If your application loses air, the piston will drift and drop. The adjustable air cushions at both ends only decelerate the piston near the stroke limits; they do not lock the load. For true fail-safe holding, consider the SAIL pneumatic lock or BSAI clamp-lock variant.
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 SAI125BX35 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 SAI125X35 is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 standard cylinders of the same bore and stroke. It uses G1/2 ports.
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