Airtac SAI125 Standard Air Cylinder SAI125X50
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X50
The AirTAC SAI125X50 is a double-acting ISO 15552 profile cylinder built for heavy-duty automation. It delivers a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa. The 50 mm stroke is ideal for short, high-force clamping or lifting movements. This tie-rod-less extruded aluminum barrel design ensures rigid performance while minimizing weight.
For demanding environments, the standard carbon steel piston rod can be upgraded to SUS304 stainless steel for corrosion resistance. Additionally, high-temperature Viton (H) seals are available instead of the standard TPU seals, allowing operation in elevated thermal zones. The barrel features dual-sided sensor grooves ready for CMSE or DMSE switches when a magnet is specified.
Airtac SAI125 Standard Air Cylinder SAI125X50 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAI125X50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SAI125X50 Is Used
Heavy-Duty Stamping
Provides the intense short-stroke thrust needed to form thick metal sheets securely in automated press lines.
Automotive Component Lift
Raises heavy engine blocks or transmission housings quickly over a 50 mm travel distance for robotic transfer.
Pallet Stopper Gate
Acts as a high-force physical barrier to halt heavy loaded pallets on high-speed conveyor lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125X50 the Right Cylinder?
Choosing this 125 mm bore makes sense when 80 mm (2513 N push at 0.5 MPa) cannot move your load, but the massive 160 mm bore (10053 N) would physically overwhelm your machine envelope. The 50 mm stroke excels in compact, high-impact tasks.
Because the stroke is under 300 mm, side-load stress on the rod bearing is minimal. However, if your application requires the load to remain suspended without constant air pressure, note that the standard adjustable air cushions only decelerate the piston at stroke ends. For true load-holding, integrate an external pilot-operated check valve or select the SAIL (air-released lock) variant. This model uses a PT tapered G1/2 port, an M27x2 rod thread, and is dimensionally interchangeable with other ISO 15552 profile cylinders.
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 SAI125X50 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X50 is a genuine ISO 15552 profile cylinder. Its mounting interface and dimensions are fully interchangeable with other ISO 15552 standard cylinders, allowing for a drop-in replacement.
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