Airtac SAI125 Standard Air Cylinder SAI125X45S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X45S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X45S
The AirTAC SAI125X45-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty actuation, delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa. Its 45 mm stroke provides short, rapid linear movement within a compact footprint. The extruded aluminum barrel design omits tie rods, presenting a clean exterior that is dimensionally interchangeable per ISO 15552 standards.
This specific configuration includes a magnetic piston (-S) for non-contact position sensing using CMSE or DMSE switches, which ride securely in the dual sensor grooves machined into both sides of the barrel. It features a standard carbon steel piston rod and utilizes PT tapered port threads for a robust pneumatic connection.
Airtac SAI125 Standard Air Cylinder SAI125X45S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X45S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAI125X45S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAI125X45S Is Used
Heavy-Duty Stamping
Provides the robust 6136 N push force required to press bearings or form metal components securely in automated press lines.
Pallet Diversion
Executes rapid 45 mm strokes to push heavy pallets or workpieces onto branching conveyor tracks without lagging.
Part Ejection
Delivers high-impact ejection force to clear dense or heavy finished parts from machining centers quickly to maintain cycle times.
Is the Airtac SAI125 Standard Air Cylinder SAI125X45S the Right Cylinder?
Select this 125 mm bore when an application demands higher thrust than an 80 mm bore can provide (2513 N at 0.5 MPa), but without stepping up to the massive 160 mm size (10053 N at 0.5 MPa). The 45 mm stroke is optimal for short clamping or ejecting tasks. Because the stroke is well under 300 mm, side-load stress on the rod bearing is minimal, though external guides should still be used if the load is not perfectly axial.
As a true ISO 15552 cylinder, this model serves as a drop-in replacement for other ISO 15552 profile cylinders, matching bore, stroke, PT G1/2 port, and standard mounting accessories like FA flanges or TC trunnions. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; they do not hold a load. If pressure is lost, the rod drifts. For dead-load holding, specify the SAIL (air-released lock) or BSAI (clamp-lock) variant instead.
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 SAI125X45S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 8590 N push force at 0.7 MPa.
Yes. The SAI is a genuine ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke, including standard mounting interface and PT G1/2 ports.
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Covers non-human-caused product damage.
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