Airtac SAI125 Standard Air Cylinder SAI125X650S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X650S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 650mm 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
- Stroke650 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X650S
The AirTAC SAI125X650-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for moving substantial masses across its 650 mm stroke. The extruded aluminum barrel design omits tie rods, providing a clean exterior that integrates seamlessly into demanding industrial environments.
Equipped with a standard magnet (-S), this model supports direct mounting of CMSE and DMSE sensor switches in the dual grooves along the barrel. The piston rod utilizes standard carbon steel for high tensile strength, and the tapered PT ports ensure a tight, reliable pneumatic connection. Operating at speeds of 30-500 mm/s, it features adjustable air cushions at both ends to manage kinetic energy during high-load cycling.
Airtac SAI125 Standard Air Cylinder SAI125X650S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X650S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 650 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 SAI125X650S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×650 | 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 SAI125X650S Is Used
Heavy-Duty Stamping
Provides the 6136 N push force required to actuate large mechanical presses and form rigid metal components securely.
Automotive Assembly
Drives large fixture clamps and positions heavy chassis components along the 650 mm travel distance on production lines.
Pallet Handling
Shifts loaded pallets or heavy material totes, utilizing the integrated magnet for precise end-of-stroke position verification.
Is the Airtac SAI125 Standard Air Cylinder SAI125X650S the Right Cylinder?
When selecting this cylinder, verify that the 6136 N output at 0.5 MPa sufficiently overcomes your total load and friction. If your application requires less force, stepping down to a 100 mm bore yields 3927 N, whereas upgrading to a 160 mm bore provides 10053 N for heavier resistance. Because this model features a 650 mm stroke, the extended rod is highly susceptible to bending under side loads; always pair it with an external guide rail or use a guided cylinder to prevent premature rod-bearing wear.
This 125 mm bore unit is dimensionally interchangeable per ISO 15552, serving as a direct drop-in replacement for other standard profile cylinders with identical mounting dimensions. It utilizes G1/2 ports and supports standard mounting accessories like FA flanges or TC trunnions. Remember that the adjustable air cushions decelerate the piston but do not lock the load; if the machinery loses air pressure, the cylinder will drift. For fail-safe position holding, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock.
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 SAI125X650S 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.
Yes, the SAI125X650-S is dimensionally interchangeable per ISO 15552. It shares standard mounting interfaces and port sizes, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders, though you should verify overall length tolerances.
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