Airtac SAI125 Standard Air Cylinder SAI125X70
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X70 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 SAI125X70
The AirTAC SAI125X70 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty pneumatic applications. It delivers a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa. The 70 mm stroke is a made-to-order length, offering precise movement for shorter travel requirements within high-force systems.
This genuine AirTAC actuator features a standard carbon steel piston rod and a tapered PT port thread. For environments requiring high-temperature resistance up to +70 C, the standard TPU seals can be swapped for Viton (H) alternatives, ensuring longevity in thermally demanding setups.
Airtac SAI125 Standard Air Cylinder SAI125X70 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X70 |
|---|---|
| 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 SAI125X70
| 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 SAI125X70 Is Used
Heavy Stamping
Provides the necessary 6136 N push force to actuate large metal stamping presses and heavy forming dies over short travel distances.
Automotive Assembly
Drives robust clamping mechanisms for automotive chassis components, ensuring secure part positioning during robotic welding.
Pallet Diverting
Powers heavy-duty lane diverters on high-mass pallet conveyor lines, using the 70 mm stroke to push loaded pallets onto secondary tracks.
Is the Airtac SAI125 Standard Air Cylinder SAI125X70 the Right Cylinder?
Selecting this 125 mm bore provides significant thrust compared to the smaller 100 mm bore, which yields 3927 N of push force at 0.5 MPa. If the 6136 N output exceeds your requirement, stepping down to the 100 mm option saves space and air consumption. Because the 70 mm stroke is non-standard, verify your mounting envelope accommodates the exact extended and retracted dimensions.
The standard SAI125X70 relies on live air pressure to maintain its position; it will drift if supply is lost, as the adjustable air cushions only decelerate the piston near stroke end and do not lock the load. For applications needing static holding without continuous pressure, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants. As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard ISO 15552 mounting interface, utilizing PT port threads and supporting FA/FB flange or TC trunnion accessories.
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 SAI125X70 FAQ
Operating at 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X70 is a genuine ISO 15552 profile cylinder. Its standardized mounting interface makes it dimensionally interchangeable with other ISO 15552 cylinders, allowing for seamless drop-in replacement using standard TC trunnion or FA flange accessories.
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