Airtac SAI125 Standard Air Cylinder SAI125X85
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X85 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 SAI125X85
The AirTAC SAI125X85 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore unit paired with an 85 mm stroke excels in high-thrust pressing and heavy load transfer. The extruded aluminum barrel design omits tie rods for a clean, structurally rigid profile.
This specific configuration features a standard carbon steel piston rod and PT (tapered) port threading. Because a magnet is not specified, it operates without sensor detection out of the box; adding the -S option later enables CMSE or DMSE switches via the dual-side barrel grooves. For applications requiring multi-directional clamping, the BSAI bidirectional clamp-lock variant is available.
Airtac SAI125 Standard Air Cylinder SAI125X85 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X85 |
|---|---|
| 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 SAI125X85
| 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 SAI125X85 Is Used
Heavy-Duty Stamping
Generates 6136 N of thrust at 0.5 MPa, making it ideal for driving heavy stamping and forming dies in automated metal fabrication lines.
Injection Molding Extraction
The 85 mm stroke provides the precise, high-force linear motion needed to extract large molded components from heavy industrial injection presses.
Pallet Diversion
Delivers the robust push force required to divert fully loaded pallets weighing hundreds of kilograms on rugged material handling conveyors.
Is the Airtac SAI125 Standard Air Cylinder SAI125X85 the Right Cylinder?
Choose this 125 mm bore when 100 mm (3927 N at 0.5 MPa) lacks the necessary power, but 160 mm (10053 N) would be excessive overkill. The 85 mm stroke provides substantial travel for heavy lifting without the space demands of a 300 mm+ unit. Since this stroke is well under the 300 mm threshold, standard rod-bearing bending is not a primary concern.
If your workflow demands the load stays fixed during a complete air pressure loss or valve centering, remember that the standard SAI piston will drift. The adjustable air cushions only decelerate the piston near the stroke ends; they do not act as a mechanical brake. For true position holding, specify the SAIL air-released lock variant. This genuine ISO 15552 profile cylinder is dimensionally interchangeable with other ISO 15552 cylinders.
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 SAI125X85 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N. If the pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes. The SAI125X85 is a true ISO 15552 profile cylinder, making its mounting interface and envelope dimensions fully interchangeable with other ISO 15552 standard cylinders from brands like SMC or Festo.
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