Airtac SAI125 Standard Air Cylinder SAI125AX375S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX375S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX375S
The AirTAC SAI125X375-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a robust 6136 N push force at 0.5 MPa. Its 375 mm stroke is well-suited for substantial linear movement tasks in large-scale fabrication. As a genuine AirTAC component, it ensures reliable performance across rigorous industrial cycles.
This specific configuration incorporates an SUS420J2 stainless steel rod (material code A) for superior corrosion resistance in demanding environments. It features PT tapered port threading and includes a built-in magnet (-S) for seamless integration with CMSE and DMSE reed switches along the dual-side sensor grooves.
Airtac SAI125 Standard Air Cylinder SAI125AX375S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX375S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAI125AX375S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAI125AX375S Is Used
Automotive Body Welding
Drives large welding fixtures and clamping arms where high force and substantial stroke are necessary to hold heavy metal panels.
Pallet Handling
Actuates heavy-duty lift and transfer mechanisms for standard industrial pallets in high-throughput distribution centers.
Plastic Injection Molding
Operates large mold extraction arms and heavy press ejectors, benefiting from the robust 6136 N force at 0.5 MPa.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX375S the Right Cylinder?
Providing 6136 N at 0.5 MPa, this 125 mm bore is a strong middle-ground for heavy automation. If your application requires less force, stepping down to the 100 mm bore yields 3927 N at 0.5 MPa, whereas upgrading to the 160 mm bore offers 10053 N for significantly heavier payloads. Because the 375 mm stroke exceeds 300 mm, lateral forces can cause rod-bearing bending; utilizing an external guide rail or a guided cylinder module is highly recommended to prevent premature wear.
For drop-in interchangeability, match the 125 mm bore, 375 mm stroke, G1/2 port, and mounting accessory (such as a TC trunnion or LB foot). Note that the standard adjustable air cushions only decelerate the piston near stroke ends and do not hold loads; if position holding is required without air pressure, specify the SAIL 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 SAI125AX375S FAQ
This double-acting cylinder generates a push force of 6136 N at 0.5 MPa, increasing to 8590 N at 0.7 MPa, and reaching a theoretical maximum of 1251 kgf at 1.0 MPa.
Yes, the SAI125X375-S is dimensionally interchangeable per ISO 15552 mounting interfaces. Ensure you match the 125 mm bore, 375 mm stroke, G1/2 port, and your specific mounting accessory for a seamless drop-in replacement.
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