Airtac SAI125 Standard Air Cylinder SAI125X950
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X950 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 SAI125X950
The AirTAC SAI125X950 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust push force of 6136 N at 0.5 MPa, it handles substantial loads across its 950 mm travel distance. The extruded aluminum barrel design omits tie rods, providing a clean exterior that simplifies mounting and sensor placement.
This specific configuration features a standard carbon steel piston rod and PT tapered port threads. Because it lacks the -S magnet option, it is optimized for pure mechanical actuation rather than electronic position sensing. If your workflow requires holding a load securely without continuous air pressure, consider the SAIL variant for its pneumatic locking mechanism.
Airtac SAI125 Standard Air Cylinder SAI125X950 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X950 |
|---|---|
| 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 SAI125X950
| 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 SAI125X950 Is Used
Heavy Stamping
Provides the 6136 N force at 0.5 MPa needed to drive heavy stamping and forming presses over a 950 mm travel distance.
Large Material Handling
Ideal for actuating massive doors or diverting heavy product flows on automotive assembly lines without requiring tie-rod obstructions.
Pallet Positioning
Shifts loaded pallets or heavy fixtures across 950 mm cycles, utilizing the robust 32 mm piston rod to maintain structural integrity.
Is the Airtac SAI125 Standard Air Cylinder SAI125X950 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when 80 mm bore units (providing 2513 N push at 0.5 MPa) lack the thrust for your heavy payloads. At 950 mm of travel, the extended rod is highly susceptible to bending under side loads. To prevent premature seal wear and rod-bearing failure, pair this unit with an external linear guide or use a guided cylinder carriage.
As a dimensionally interchangeable ISO 15552 component, it serves as a direct drop-in replacement for other standard profile cylinders with matching 125 mm bore, 950 mm stroke, G1/2 port, and compatible FA flange or TC trunnion accessories. Remember that the adjustable air cushions only decelerate the piston at stroke ends; they do not function as an emergency brake.
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 SAI125X950 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
No, the 950 mm stroke requires external guidance to prevent rod bending. The adjustable air cushions at both ends only decelerate the piston near the end of travel and cannot support lateral loads.
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