Airtac SAI125 Standard Air Cylinder SAI125AX950
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX950 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX950
The AirTAC SAI125X950 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N at 0.5 MPa and 8590 N at 0.7 MPa, making it well-suited for moving substantial masses over its 950 mm stroke. The extruded aluminum barrel design omits tie rods for a clean exterior.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance in humid or mildly corrosive environments. It utilizes PT tapered port threading and lacks a standard magnet, meaning position sensing via CMSE or DMSE switches is not supported without modification. For operations requiring intermediate stopping under lost pressure, the SAIL variant with an air-released lock is a better fit.
Airtac SAI125 Standard Air Cylinder SAI125AX950 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX950 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAI125AX950
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAI125AX950 Is Used
Heavy Stamp Press Feed
Provides the 8590 N push force at 0.7 MPa required to actuate heavy-duty stamping press clamps and material feeding gates over a long 950 mm reach.
Bulk Pallet Diverting
Ideal for diverting heavy wooden or metal pallets on high-throughput conveyor lines, utilizing the full 950 mm stroke to clear large product profiles.
Automated Assembly Lifts
Drives large-scale lifting platforms in automated assembly cells where moving substantial vertical loads over a long stroke is necessary.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX950 the Right Cylinder?
With a 950 mm stroke on a 125 mm bore, this cylinder generates extreme extension lengths that demand careful side-load management. Long unsupported rods are highly susceptible to bending under lateral forces; always utilize an external guide rail or a fully guided cylinder to prevent rod-bearing damage. If your application requires slightly less force, stepping down to a 100 mm bore yields 5497 N at 0.7 MPa, while upgrading to a 160 mm bore provides 14074 N at 0.7 MPa.
To ensure seamless ISO 15552 mounting interchangeability, verify your existing mounting hardware (such as TC trunnion or CA clevis brackets), PT port compatibility, and the need for a magnet (-S suffix) for sensor tracks. Because this is a standard double-acting actuator, it will drift and drop if air pressure is removed or exhausted; do not rely on its adjustable air cushions to hold loads, as they only decelerate the piston near stroke ends.
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 SAI125AX950 FAQ
The SAI125X950 cylinder provides a push force of 6136 N at 0.5 MPa and 8590 N at 0.7 MPa. The pull force at 0.5 MPa is 5734 N.
Yes, the SAI125X950 is dimensionally interchangeable per ISO 15552 standards, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders with matching mounting interfaces.
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