Airtac SAI125 Standard Air Cylinder SAI125BX350S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX350S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX350S
The AirTAC SAI125X350-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore unit is built to move substantial masses across its 350 mm stroke. The extruded aluminum barrel design eliminates traditional tie-rods, providing a sleek profile while maintaining strict dimensional interchangeability with other ISO 15552 cylinders.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh environments. Equipped with a built-in magnet (-S), it seamlessly integrates with CMSE and DMSE sensor switches housed in the dual-side grooves. Fluid compatibility is limited to filtered air, operating efficiently at speeds of 30-500 mm/s.
Airtac SAI125 Standard Air Cylinder SAI125BX350S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX350S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAI125BX350S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAI125BX350S Is Used
Heavy Stamping
Provides the high thrust needed to actuate large stamping presses and form heavy-gauge metal components reliably.
Automotive Assembly
Moves heavy chassis components or positions large fixtures on the assembly line with precise 350 mm travel.
Pallet Diverting
Handles robust diverting mechanisms for heavy industrial pallets, utilizing the full force of the 125 mm bore.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX350S the Right Cylinder?
Selecting this 125 mm bore is ideal when 100 mm cylinders (providing 3927 N at 0.5 MPa) lack the necessary thrust, but stepping up to a 160 mm bore (10053 N) would be excessive. For a 350 mm stroke, the unsupported rod length is significant; side loads can cause rod-bearing bending and premature wear. Implement an external guide rail or choose a guided cylinder to absorb lateral forces. To hold a load securely without live air pressure, select the SAIL or BSAI variant, as the standard adjustable air cushion only decelerates the piston at stroke end and does not act as a brake.
As a drop-in replacement, match the exact 125 mm bore, 350 mm stroke, G1/2 (PT tapered) port, and required mounting accessory (such as LB foot or TC trunnion). Ensure the -S magnet option is specified if position sensing is required.
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 SAI125BX350S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X350-S is dimensionally interchangeable per ISO 15552 standards. You can drop it in as a replacement for other ISO 15552 profile cylinders with matching 125 mm bore, 350 mm stroke, and G1/2 ports.
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