Airtac SAI125 Standard Air Cylinder SAI125AX400
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX400 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX400
The AirTAC SAI125X400 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation, delivering a robust 6136 N of push force at just 0.5 MPa. Its 400 mm stroke is perfectly suited for moving substantial masses across long linear distances in packaging and material handling lines.
Built with an extruded aluminum barrel, this model features a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads and operates efficiently within a 30-500 mm/s speed range.
Airtac SAI125 Standard Air Cylinder SAI125AX400 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX400 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 400 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 SAI125AX400
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×400 | 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 SAI125AX400 Is Used
Heavy Stamping
Provides the 6136 N push force required to form thick metal components in automated stamping presses.
Pallet Diversion
Executes 400 mm strokes to shift heavy loaded pallets across high-throughput conveyor transfer lines.
Large Carton Sealing
Drives massive sealing heads over wide packaging loads, ensuring consistent pressure across the carton.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX400 the Right Cylinder?
With a 125 mm bore yielding 6136 N at 0.5 MPa, this cylinder handles heavy payloads. If your application requires less force, stepping down to the 100 mm bore provides 3927 N, while upgrading to the 160 mm bore offers 10053 N for extreme loads. Because the 400 mm stroke creates a long unsupported rod extension, always use an external guide rail or a fully guided cylinder to prevent rod-bearing bending under side loads.
As an ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard ISO 15552 unit with a 125 mm bore, 400 mm stroke, G1/2 port, and compatible mounting accessories like TC trunnions or LB foot brackets. Note that the adjustable air cushions only decelerate the piston at end-strokes; if you need to hold a load vertically without constant air pressure, integrate the SAIL locking variant or an external pilot-operated check valve.
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 SAI125AX400 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes. Because the SAI125X400 is manufactured to the ISO 15552 standard, its mounting interface and envelope dimensions are fully interchangeable with other ISO 15552 profile cylinders of the same bore and stroke.
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