Airtac SAI125 Standard Air Cylinder SAI125BX325
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX325 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX325
The AirTAC SAI125X325 is a double-acting ISO 15552 profile cylinder engineered to deliver a robust 6136 N push force at 0.5 MPa and 8590 N at 0.7 MPa. With a 325 mm stroke, it is dimensionally interchangeable per ISO 15552, offering a drop-in replacement for other standard profile cylinders. This unit features a tapered PT port thread and a highly corrosion-resistant SUS304 stainless steel piston rod.
To suit demanding environments, the standard TPU seals can be swapped for Viton (H) for high-temperature applications or NBR (N) for specific fluid compatibility. The extruded aluminum barrel includes sensor switch grooves on both sides, allowing for direct mounting of CMSE or DMSE switches if a magnet is specified later. For synchronized or clamping operations, consider the SAID double-rod variant.
Airtac SAI125 Standard Air Cylinder SAI125BX325 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX325 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAI125BX325
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAI125BX325 Is Used
Heavy-Duty Stamping
Provides the necessary 8590 N force at 0.7 MPa to actuate large mechanical stamping and forming presses reliably.
Pallet Diverting
Drives robust diverting arms on high-capacity conveyor lines, easily moving heavy pallets via the 325 mm stroke.
Automated Welding Jigs
Positions large automotive welding fixtures with precision, utilizing the SUS304 rod for resistance to weld spatter.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX325 the Right Cylinder?
Select this 125 mm bore when 80 mm falls short, providing a significant leap from 2513 N to 6136 N at 0.5 MPa. For slightly lower force requirements, stepping down to an 80 mm bore saves space and air consumption. This model uses a G1/2 port, M27x2 rod thread, and offers an adjustable air cushion stroke of 40 mm at both ends.
Because the 325 mm stroke is substantial, the unsupported piston rod is susceptible to bending under side loads. To prevent premature rod-bearing wear, implement an external guide rail or utilize a fully guided cylinder design. Furthermore, this standard cylinder lacks a holding mechanism; if the application must retain a load during a complete loss of air pressure, integrate an external pilot-operated check valve or specify the SAIL 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 SAI125BX325 FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, as a true ISO 15552 profile cylinder, its mounting interface is dimensionally interchangeable with other ISO 15552 cylinders, making it a drop-in replacement. It uses a G1/2 port and M27x2 rod thread.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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