Airtac SAI125 Standard Air Cylinder SAI125X120S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X120S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X120S
The AirTAC SAI125X120-S is a double-acting ISO 15552 profile cylinder offering a robust 6136 N push force at 0.5 MPa and 8590 N at 0.7 MPa. The 120 mm stroke is ideal for high-thrust automation tasks requiring moderate travel. As an extruded aluminum profile barrel design, it omits tie rods for a clean exterior.
This specific configuration includes a magnetic piston (-S) for non-contact position detection using CMSE or DMSE series reed switches along the integrated sensor grooves on both sides. The standard carbon steel piston rod ensures durable performance, while the adjustable air cushions at both ends absorb kinetic energy at stroke endpoints.
Airtac SAI125 Standard Air Cylinder SAI125X120S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X120S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAI125X120S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAI125X120S Is Used
Heavy-Duty Stamping
Provides the 8590 N thrust at 0.7 MPa required for firmly pressing metal or plastic components into housings on an assembly line.
Pallet Diverting
Uses the 120 mm stroke to push heavy loaded pallets from a main conveyor line onto a secondary packaging spur.
Large Gate Actuation
Operates substantial machine safety gates or material flow hoppers where a magnetic piston confirms open/closed states via sensors.
Is the Airtac SAI125 Standard Air Cylinder SAI125X120S the Right Cylinder?
Selecting this 125 mm bore provides substantial thrust (6136 N at 0.5 MPa); stepping down to a 100 mm bore yields 3927 N, while a 160 mm bore offers 10053 N. For this 120 mm stroke, side loads are minimal, but always ensure axial alignment to prevent premature rod bearing wear.
Because it is a double-acting pneumatic actuator, the SAI125X120-S will not hold a load if air pressure is lost or the control valve is centered. If your fixture requires fail-safe load holding, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock. This model is dimensionally interchangeable per ISO 15552, featuring a G1/2 PT port, M27x2 rod thread, and standard mounting accessories like FA flanges or TC trunnions.
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 SAI125X120S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X120-S is a true ISO 15552 profile cylinder, making its mounting interface and center dimensions a drop-in replacement for other ISO 15552 standard cylinders.
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