Airtac SAI125 Standard Air Cylinder SAI125BX115
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX115 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX115
The AirTAC SAI125X115 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N at 0.5 MPa, making it well-suited for high-thrust actuation over its 115 mm stroke. The extruded aluminum barrel eliminates tie-rods, providing a clean profile that drops directly into standardized ISO 15552 mounting interfaces.
This specific configuration features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads, and because it lacks the -S magnet suffix, position sensing via CMSE or DMSE switches is not enabled. For operations requiring pneumatic locking, the SAIL variant provides a dedicated holding mechanism.
Airtac SAI125 Standard Air Cylinder SAI125BX115 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX115 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAI125BX115
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAI125BX115 Is Used
Heavy Metal Forming
Provides the 6136 N thrust at 0.5 MPa required for pressing and stamping rigid metal components in automated fabrication lines.
Injection Mold Ejection
Drives heavy ejection plates in plastic molding machinery, utilizing the SUS304 rod to resist moisture and cooling fluid exposure.
Pallet Handling
Actuates large-scale diverters and lifts in high-capacity packaging hubs where substantial pushing force is mandatory.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX115 the Right Cylinder?
Select this 125 mm bore when 80 mm cylinders (providing 2513 N push at 0.5 MPa) lack the necessary power for heavy lifting. If your application requires less force and faster cycling, stepping down to a 100 mm bore (3927 N at 0.5 MPa) is advisable. Operating speed for this bore is 30-500 mm/s.
As a standard double-acting cylinder, the SAI125X115 relies on adjustable air cushions at both ends to decelerate the piston, but it will not hold a load if air pressure is lost. Use the SAIL or BSAI clamp-lock variant if mid-stroke position holding is required. When integrating this model, match the exact 125 mm bore, 115 mm stroke, PT G1/2 port, and appropriate ISO 15552 mounting accessories like FA flange or TC trunnion.
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 SAI125BX115 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes, it is dimensionally interchangeable per ISO 15552. You can replace existing ISO 15552 profile cylinders of the same bore and stroke by matching the PT G1/2 port and standard mounting accessories.
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