Airtac SAI125 Standard Air Cylinder SAI125BX35S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX35S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX35S
The AirTAC SAI125X35-S is a double-acting ISO 15552 profile cylinder engineered for high-thrust, short-stroke automation tasks. Operating at 0.15-1.0 MPa, it generates a push force of 6136 N at 0.5 MPa, extending to 8590 N at 0.7 MPa. The 35 mm stroke provides rapid, compact actuation, while the adjustable air cushions at both ends ensure smooth end-of-stroke deceleration.
This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance in washdown or chemically active environments. It features PT tapered port threads and is equipped with a magnet (-S) for direct mounting of CMSE or DMSE proximity switches along the dual sensor grooves on the extruded aluminum barrel.
Airtac SAI125 Standard Air Cylinder SAI125BX35S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX35S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 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 SAI125BX35S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | 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 SAI125BX35S Is Used
Heavy Stamping
Provides the robust 6136 N push force required for short-stroke metal forming, riveting, and stamping operations.
High-Force Clamping
Ideal for securing heavy workpieces during machining, utilizing the SUS304 rod to withstand harsh coolant exposure.
Pallet Stopping
Functions as a heavy-duty stopper in high-mass conveyor lines, where the 35 mm stroke and adjustable cushions absorb impact safely.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX35S the Right Cylinder?
Selecting this 125 mm bore cylinder is appropriate when an application demands high force that smaller bores cannot achieve, such as the 63 mm bore which only yields 1559 N at 0.5 MPa. If 6136 N is excessive for your payload, stepping down to the 100 mm bore (3927 N at 0.5 MPa) optimizes air consumption. Because the stroke is only 35 mm, side-load stress on the rod bearing is minimal, though external guides are always recommended for perfectly linear motion.
This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders. To match this exact unit, specify a 125 mm bore, 35 mm stroke, PT G1/2 port, and the -S magnet option. Remember that a standard SAI does not hold its load if air pressure is exhausted; for fail-safe load holding, consider 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 SAI125BX35S FAQ
At a 0.5 MPa operating pressure, the SAI125X35-S generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X35-S is a genuine ISO 15552 profile cylinder, making its mounting dimensions fully interchangeable with other ISO 15552 standard cylinders. Ensure your setup matches the G1/2 PT port and 125 mm bore specifications.
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