Airtac SAI125 Standard Air Cylinder SAI125X270
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X270 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X270
The AirTAC SAI125X270 is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and 270mm stroke. It generates a substantial 8590N push force at 0.7MPa, making it well-suited for heavy-duty actuation over a mid-range travel distance.
This model utilizes a standard carbon steel piston rod and offers NBR or Viton (H) seal options for high-temperature environments. The extruded aluminum barrel includes dual sensor grooves, allowing direct mounting of CMSE or DMSE switches when a magnet (-S) is specified.
Airtac SAI125 Standard Air Cylinder SAI125X270 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X270 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAI125X270
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAI125X270 Is Used
Heavy Material Forming
Provides the robust 8590N push force required to actuate large presses and metal forming machinery over a 270mm travel distance.
Pallet Diversion
Ideal for driving heavy-duty diverter arms on conveyor systems handling substantial pallet loads in distribution centers.
Automotive Assembly Jigs
Delivers reliable clamping and positioning power for large structural automotive components during robotic welding.
Is the Airtac SAI125 Standard Air Cylinder SAI125X270 the Right Cylinder?
Select this 125mm bore when an 80mm bore (providing 3518N push at 0.7MPa) is insufficient for your load requirements. For applications needing even more power, stepping up to a 160mm bore yields 14074N. As an ISO 15552 profile cylinder, this unit is dimensionally interchangeable with similar ISO 15552 cylinders, utilizing a PT tapered G1/2 port and standard mounting accessories like TC trunnion or FA flange.
Because the 270mm stroke exceeds 250mm, be mindful of side-load and rod-bearing bending. Implement an external guide rail or use a guided cylinder to prevent premature wear on the rod seal. Note that the standard adjustable air cushions only decelerate the piston at stroke ends; they do not hold a load. If position holding without live air pressure is required, select the SAIL or BSAI 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 SAI125X270 FAQ
At an operating pressure of 0.7MPa, this 125mm bore cylinder generates 8590N of push force and 5734N of pull force. At 0.5MPa, the push force is 6136N.
Yes, the SAI125X270 is a genuine ISO 15552 profile cylinder. Its standardized mounting dimensions make it a drop-in replacement for other ISO 15552 cylinders, matching the G1/2 port and standard mounting interface.
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