Airtac SAI125 Standard Air Cylinder SAI125X500
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X500 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X500
The AirTAC SAI125X500 is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and 500mm stroke. It delivers a robust push force of 6136 N at 0.5 MPa, making it well-suited for heavy-duty positioning and clamping tasks over extended distances. The extruded aluminum barrel omits tie rods, presenting a clean exterior that drops directly into existing ISO 15552 mounting interfaces.
This specific configuration incorporates a standard carbon steel piston rod and PT tapered port threads. While the base model lacks a magnet, the barrel retains dual sensor grooves for adding CMSE or DMSE switches if needed. For environments exceeding standard temperature ranges, the cylinder can be specified with Viton (H) seals instead of the default TPU.
Airtac SAI125 Standard Air Cylinder SAI125X500 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X500 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAI125X500
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAI125X500 Is Used
Heavy-Duty Stamping
Provides the high thrust required to actuate large metal stamping presses and forming dies over a 500mm travel distance.
Automotive Assembly
Ideal for positioning heavy chassis components or applying consistent clamping force during robotic welding operations.
Pallet Handling
Drives robust lifting and positioning mechanisms for heavy palletized goods in automated distribution centers.
Is the Airtac SAI125 Standard Air Cylinder SAI125X500 the Right Cylinder?
Selecting this 125mm bore over the neighboring 100mm option upgrades your thrust from 3927 N to 6136 N at 0.5 MPa, providing the extra muscle needed for heavy payloads. Conversely, if 500mm of travel is unnecessary, stepping down to an 80mm bore saves space and air consumption while still yielding 2513 N of push force.
At a 500mm stroke, the extended rod is highly susceptible to bending under side loads. To prevent premature rod-bearing wear, pair this cylinder with an external linear guide or utilize a fully guided cylinder design. Note that the adjustable air cushions at both ends only decelerate the piston near stroke completion; they do not hold loads. If your application requires position holding upon air loss, integrate an external pilot-operated check valve or select the SAIL (air-released lock) variant. Replacement is straightforward via the ISO 15552 interface: match the 125mm bore, 500mm stroke, G1/2 port, and appropriate 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 SAI125X500 FAQ
This 125mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X500 is dimensionally interchangeable per ISO 15552. You can drop it into existing mounts matching the 125mm bore, 500mm stroke, and G1/2 port size.
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