Airtac SAI125 Standard Air Cylinder SAI125BX15
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX15 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 15mm 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
- Stroke15 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX15
The AirTAC SAI125X15 is a double-acting ISO 15552 profile cylinder featuring a robust extruded aluminum barrel. Delivering a substantial 6136 N push force at 0.5 MPa, this short-stroke actuator is built for heavy-duty clamping and holding tasks. The 15 mm stroke is a made-to-order, non-standard dimension tailored for compact, high-force mechanisms.
Beyond the standard spec sheet, this specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in humid or washdown environments. It utilizes PT tapered port threads and lacks a standard magnet (-S), meaning it is optimized purely for actuation rather than position sensing.
Airtac SAI125 Standard Air Cylinder SAI125BX15 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX15 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 15 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 SAI125BX15
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×15 | 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 SAI125BX15 Is Used
Heavy-Duty Stamping
Provides 6136 N of thrust at 0.5 MPa for short-stroke metal forming, riveting, and impact stamping operations.
Pallet Clamping
Secures heavy pallets or industrial fixtures in confined spaces where a 15 mm stroke is sufficient to lock the load.
Press Fit Assembly
Drives bearings or pins into housings with precise, high-force short-travel movements on automated assembly lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX15 the Right Cylinder?
Selecting this 125 mm bore model makes sense when you need maximum thrust in a minimal stroke envelope; stepping down to a 100 mm bore drops your 0.5 MPa push force to 3927 N, which may be insufficient for heavy pressing. Conversely, if your application requires longer travel, evaluate the standard 25 mm stroke option.
Because the SAI125X15 operates as a standard double-acting cylinder, it relies on continuous air pressure to maintain force. If your clamping application must hold a load safely during a pneumatic pressure loss, integrate an external pilot-operated check valve or transition to the AirTAC SAIL air-released lock variant. To mount this actuator, use ISO 15552 interface accessories like the FA flange or LB foot bracket.
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 SAI125BX15 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach up to 8590 N push force at 0.7 MPa.
Yes. The SAI125X15 is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 standard cylinders from brands like Festo or SMC.
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