Airtac SAI125 Standard Air Cylinder SAI125X85S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X85S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X85S
The AirTAC SAI125X85-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N of push force at 0.5 MPa, this 125 mm bore unit is built to handle substantial payloads efficiently. The 85 mm stroke provides precise short-travel motion control. Equipped with a -S magnet, the extruded aluminum barrel features dual sensor grooves designed specifically for seamless CMSE and DMSE switch integration.
Standard configuration includes a durable carbon steel piston rod and tapered PT G1/2 port threads. For applications requiring position retention without continuous air pressure, this standard cylinder will drift upon loss of pressure; consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants for secure load holding.
Airtac SAI125 Standard Air Cylinder SAI125X85S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X85S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SAI125X85S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SAI125X85S Is Used
Heavy-Duty Pressing
Ideal for short-stroke pressing and stamping operations requiring up to 8590 N of thrust at 0.7 MPa.
Automotive Assembly
Provides the robust, reliable clamping force necessary for holding heavy chassis or powertrain components during robotic welding.
Pallet Stops
Acts as a heavy-duty stopper mechanism on automated conveyor lines, effortlessly halting large material pallets.
Is the Airtac SAI125 Standard Air Cylinder SAI125X85S the Right Cylinder?
Selecting this 125 mm bore is optimal when the 80 mm class (yielding 2513 N at 0.5 MPa) is insufficient for your heavy lifting requirements. The 85 mm stroke is well-suited for compact, high-force clamping or pressing tasks. Because it adheres strictly to ISO 15552 mounting dimensions, it serves as a direct dimensional drop-in replacement for comparable ISO 15552 profile cylinders, utilizing standard FA/FB flanges or TC trunnion mounts.
Although 85 mm is a relatively short stroke, always verify rod-bearing loads when absorbing high kinetic energy. The adjustable air cushions at both ends (40 mm cushion length) are strictly for decelerating the piston near stroke end to prevent impact damage; they do not function as a locking brake or holding mechanism.
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 SAI125X85S 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. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X85-S is a genuine AirTAC profile cylinder built to standard ISO 15552 mounting dimensions, making it dimensionally interchangeable with other ISO 15552 cylinders using standard mounting accessories.
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