Airtac SAI125 Standard Air Cylinder SAI125X260
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X260 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X260
The AirTAC SAI125X260 is a double-acting profile cylinder built to ISO 15552 dimensional standards, ensuring drop-in compatibility with globally standardized mounting accessories. Delivering a robust 6136 N of push force at 0.5 MPa and 8590 N at 0.7 MPa, it is engineered for heavy-duty industrial actuation. The 260 mm stroke provides ample travel for moving substantial payloads, while the adjustable air cushions at both ends absorb kinetic energy to protect components.
This model features a standard carbon steel piston rod for high tensile strength and utilizes PT tapered port threads (G1/2) for a mechanically reliable pneumatic seal. Because it lacks the -S magnet option, it does not integrate position sensors directly; for applications requiring end-of-stroke confirmation, a magnet-equipped variant or external sensors would be required.
Airtac SAI125 Standard Air Cylinder SAI125X260 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X260 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 260 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 SAI125X260
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×260 | 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 SAI125X260 Is Used
Heavy-Duty Stamping
Provides the high thrust necessary for pressing bearings, bushings, or plates securely into heavy industrial housings.
Bulk Material Diverting
Actuates large, heavy-duty diverter gates on high-capacity conveyor lines handling dense aggregates or metal parts.
Large Mold Handling
Shifts substantial injection mold halves or heavy tooling plates across a 260 mm travel distance during automated changeovers.
Is the Airtac SAI125 Standard Air Cylinder SAI125X260 the Right Cylinder?
Selecting this 125 mm bore is ideal when a 100 mm bore (offering 3927 N at 0.5 MPa) is insufficient to overcome the system's friction and load, but a 160 mm bore (10053 N at 0.5 MPa) would be physically oversized and waste valuable machine space. The 260 mm stroke is a standard size, falling well within the 1500 mm maximum limit for this bore, making it readily available without made-to-order delays.
With a stroke of 260 mm, the unsupported length of the rod when extended is significant; heavy side loads can cause rod-bearing bending and premature wear. Utilizing an external guide rail or a fully guided cylinder is strongly recommended to absorb lateral forces. Furthermore, this standard SAI cylinder relies on air pressure to maintain its position; if air is lost or exhausted, the piston will drift. For fail-safe load holding without continuous air pressure, specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant instead.
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 SAI125X260 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X260 is a genuine ISO 15552 profile cylinder, making its mounting interface and envelope dimensions fully interchangeable with other ISO 15552 cylinders like those from SMC or Festo. Always verify your specific port and rod thread requirements before finalizing the swap.
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