Airtac SAI125 Standard Air Cylinder SAI125X375S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X375S 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 SAI125X375S
The AirTAC SAI125X375-S is a double-acting ISO 15552 profile cylinder offering 8590 N push force at 0.7 MPa. Its 375 mm stroke suits long-travel material handling and heavy press operations. The extruded aluminum barrel omits tie rods for a clean exterior.
This unit includes a standard carbon steel piston rod and a magnetic piston (-S) for direct mounting of CMSE or DMSE reed switches along the dual sensor grooves. For high-temperature environments up to 70 C, Viton (H) seals are available as an alternative to the standard TPU.
Airtac SAI125 Standard Air Cylinder SAI125X375S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X375S |
|---|---|
| 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 SAI125X375S
| 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 SAI125X375S Is Used
Heavy Stamping
Provides the robust 8590 N force at 0.7 MPa required for heavy-duty metal forming and stamping presses.
Pallet Handling
The 375 mm stroke accommodates long push-off distances for large pallets in automated packaging lines.
Large Clamp Operations
Ideal for securing heavy workpieces during CNC machining, utilizing the integrated magnet for end-position sensing.
Is the Airtac SAI125 Standard Air Cylinder SAI125X375S the Right Cylinder?
At 0.5 MPa this bore provides 6136 N of thrust; if your application requires less force, stepping down to the 100 mm bore yields 3927 N at the same pressure, reducing air consumption. For higher force demands, the 160 mm bore generates 10053 N.
Because the 375 mm stroke creates an extended unsupported rod length, side loads will induce bending stresses on the rod bearing. Implement an external guide rail or select a guided cylinder to prevent premature wear. Note that the adjustable air cushions only decelerate the piston at end-of-stroke; they do not hold a load. For position holding without air pressure, specify the SAIL or BSAI locking variants.
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 SAI125X375S FAQ
The cylinder generates 6136 N of push force at 0.5 MPa and 8590 N at 0.7 MPa. The maximum theoretical force at 1.0 MPa is 1251 kgf.
Yes, the SAI125X375-S is dimensionally interchangeable per ISO 15552, allowing it to replace other standard profile cylinders with identical mounting interfaces. It uses G1/2 PT ports.
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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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