Airtac SAI125 Standard Air Cylinder SAI125X225
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X225 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X225
The AirTAC SAI125X225 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this 125 mm bore actuator handles substantial loads. The 225 mm stroke is a made-to-order dimension, providing exact travel for specialized machine movements. Its extruded aluminum barrel design omits tie-rods for a clean exterior.
This model features a standard carbon steel piston rod for robust tensile strength. The barrel includes integrated sensor grooves on both sides, allowing you to easily mount CMSE or DMSE reed switches when you specify the -S magnet option. It also incorporates adjustable air cushions at both ends, with a 40 mm cushion stroke to smoothly decelerate high-mass loads.
Airtac SAI125 Standard Air Cylinder SAI125X225 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X225 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAI125X225
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAI125X225 Is Used
Heavy-Duty Pressing
Ideal for applying 6136 N of force at 0.5 MPa for assembling bearings or pressing pins in automotive manufacturing lines.
Large Mold Handling
The 225 mm stroke provides the precise extension needed to position heavy industrial molds or tooling within machining centers.
Pallet Diverting
Generates the massive lateral force required to divert heavy pallets on high-throughput packaging and logistics conveyors.
Is the Airtac SAI125 Standard Air Cylinder SAI125X225 the Right Cylinder?
If 6136 N at 0.5 MPa is more force than your application requires, consider stepping down to the 100 mm bore, which provides 3927 N. Conversely, if you need higher thrust, the 160 mm bore offers 10053 N. Because this 225 mm stroke is non-standard, expect a slightly longer lead time for made-to-order fulfillment.
For this stroke length, monitor side-load forces to prevent rod-bearing bending. Utilizing an external guide rail system or a guided cylinder carriage is recommended to keep the piston rod perfectly aligned. Remember that this standard cylinder relies on live air pressure to hold its position; if pressure is lost, the load will drift. For fail-safe position holding, specify the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock. As a true ISO 15552 profile cylinder, it serves as a drop-in replacement for any standard 125 mm bore, 225 mm stroke, G1/2 port, PT threaded interface with compatible FA/FB flange or TC trunnion mounts.
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 SAI125X225 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X225 is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other 125 mm bore profile cylinders with a G1/2 port and 225 mm stroke, utilizing standard FA, LB, or TC mounting accessories.
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