Airtac SAI125 Standard Air Cylinder SAI125X320
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X320 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 320mm 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
- Stroke320 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X320
The AirTAC SAI125X320 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N at 0.5 MPa, this 125 mm bore unit paired with a 320 mm stroke excels in high-thrust pressing and heavy load transfer. The extruded aluminum barrel design omits tie-rods, providing a clean exterior that is dimensionally interchangeable with other ISO 15552 cylinders.
Configured here with a standard carbon steel piston rod and PT tapered port threads, this variant lacks a standard magnet. For applications requiring position feedback, the barrel features dual-sided sensor grooves ready to accept CMSE or DMSE switches, which would necessitate specifying the -S magnet option. Furthermore, if your sequence requires intermediate stopping, consider the SAIJ adjustable-stroke derivative.
Airtac SAI125 Standard Air Cylinder SAI125X320 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X320 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 320 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 SAI125X320
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×320 | 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 SAI125X320 Is Used
Heavy-Duty Stamping
Provides the robust 6136 N thrust required for pressing bearings, bushings, and heavy components into automotive assemblies.
Pallet Diverting
Handles large, heavy pallets smoothly across material handling lines, utilizing the 320 mm stroke to shift loads into branching lanes.
Plastic Mold Ejection
Delivers consistent high-force ejection of dense molded parts from heavy industrial injection molding machinery.
Is the Airtac SAI125 Standard Air Cylinder SAI125X320 the Right Cylinder?
This 125 mm bore generates 6136 N at 0.5 MPa, providing substantial power for large presses. If your application requires slightly less force, stepping down to the 100 mm bore yields 3927 N, whereas escalating to the 160 mm bore provides 10053 N. Operating speed for this size is optimized for 30-500 mm/s.
With a 320 mm stroke, the unsupported rod length is significant; side loads will induce severe bending stress on the rod bearing and seal. To prevent premature wear, implement an external guide rail or utilize a fully guided cylinder. Additionally, the standard SAI cannot hold a load if air pressure drops—the adjustable cushions only decelerate the piston at end-of-stroke. For absolute safety against gravity drops, integrate the SAIL locking variant or an external pilot-operated check valve. This unit is fully interchangeable per ISO 15552 mounting dimensions, supporting LB, FA, and TC accessory kits.
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 SAI125X320 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
Yes, the SAI125X320 is a genuine ISO 15552 profile cylinder. Its standardized mounting interface and center-to-center dimensions make it a drop-in replacement for other ISO 15552 profile cylinders, though it is not identical to any specific brand's proprietary part.
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