Airtac SAI125 Standard Air Cylinder SAI125BX70S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX70S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX70S
The AirTAC SAI125X70-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125mm bore actuator is built to handle substantial loads. The 70mm stroke provides precise short-travel actuation for high-force operations.
This configuration features a SUS304 stainless steel rod (option B) for superior corrosion resistance in harsh environments. Equipped with a magnet (-S), the extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE or DMSE switches. Ports utilize PT tapered threads.
Airtac SAI125 Standard Air Cylinder SAI125BX70S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX70S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 70 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 SAI125BX70S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×70 | 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 SAI125BX70S Is Used
Heavy Stamping
Provides the high impact force required for metal forming, punching, and heavy stamping presses.
Pallet Stopping
Acts as a robust stopper block for heavy industrial pallets and transfer lines on assembly floors.
Press Fit Assembly
Delivers steady pressure for seating large bearings and bushings into housings.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX70S the Right Cylinder?
Choose this 125mm bore when 100mm (3927 N at 0.5 MPa) lacks the necessary thrust for your application. If your cycle speed is critical, note that the 125mm bore operates at a maximum speed of 30-500 mm/s. As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for other ISO 15552 cylinders without requiring custom mounting plates.
Because the stroke is under 300mm, side-load stress on the rod bearing is minimal. However, the standard SAI cannot hold a load if air pressure drops; for fail-safe holding, specify the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variant.
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 SAI125BX70S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, it is a genuine profile-barrel ISO 15552 cylinder. Its standardized mounting interface makes it dimensionally interchangeable with other ISO 15552 cylinders.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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