Airtac SAI125 Standard Air Cylinder SAI125X375
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X375 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X375
The AirTAC SAI125X375 is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and a 375mm stroke. Because 375mm exceeds the standard maximum stroke of 1500mm for this bore, it is manufactured as a non-standard, made-to-order unit. It delivers a robust push force of 6136N at 0.5 MPa and 8590N at 0.7 MPa, making it well-suited for heavy-duty automation tasks requiring significant linear thrust over an extended distance.
This model incorporates a standard carbon steel piston rod and PT (tapered) port threads. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE or DMSE switches, though a magnet (-S) must be specified separately if magnetic sensing is required. For applications needing multi-directional clamping or position holding without continuous air pressure, the related BSAI bidirectional clamp-lock cylinder is a highly effective alternative.
Airtac SAI125 Standard Air Cylinder SAI125X375 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X375 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAI125X375
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAI125X375 Is Used
Heavy Stamping
Provides the 8590N push force at 0.7 MPa needed to actuate large mechanical presses and form thick metal components.
Automated Assembly
Drives large-scale jigs and heavy industrial fixtures over the 375mm travel distance during multi-stage product assembly.
Pallet Diverting
Shifts heavy loaded pallets across high-capacity conveyor lines where substantial side thrust is required to redirect mass.
Is the Airtac SAI125 Standard Air Cylinder SAI125X375 the Right Cylinder?
Selecting this bore size is appropriate when the 80mm variant (providing 2513N at 0.5 MPa) lacks the necessary thrust for high-inertia loads. At 375mm of stroke, the extended carbon steel rod is susceptible to bending under side loads. To prevent premature rod-bearing wear, implement an external guide rail or use a fully guided linear actuator to absorb lateral forces. Because this is a custom 375mm stroke, verify that your machine envelope accommodates the non-standard overall length.
As an ISO 15552 profile cylinder, it serves as a drop-in replacement for other ISO 15552 compliant actuators with matching 125mm bore, 375mm stroke, G1/2 ports, and standard mounting accessories like TC trunnion or FA flanges. Note that the standard SAI does not hold its position if air pressure is lost; if fail-safe load holding is required, specify the SAIL variant with an air-released lock or use an external rod lock.
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 SAI125X375 FAQ
The SAI125X375 cylinder provides a push force of 6136N at 0.5 MPa and 8590N at 0.7 MPa, with a pull force of 5734N at 0.5 MPa.
Yes, it is dimensionally interchangeable per ISO 15552 profile standards, meaning it matches the mounting interface, G1/2 ports, and 125mm bore dimensions of equivalent ISO cylinders.
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