Airtac SAI125 Standard Air Cylinder SAI125BX125
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX125 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX125
The AirTAC SAI125X125 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It delivers a substantial push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it well-suited for high-thrust pressing and heavy load manipulation within a 125 mm stroke. The extruded aluminum barrel eliminates tie-rods, providing a clean exterior that integrates seamlessly into ISO 15552 mounting systems.
This specific configuration features a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in washdown or chemically exposed environments. It utilizes tapered PT port threads and operates without a magnet. For applications requiring end-position holding under pressure loss, consider the related SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants, as the standard adjustable air cushions only decelerate the piston and do not prevent drift.
Airtac SAI125 Standard Air Cylinder SAI125BX125 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX125 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAI125BX125
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAI125BX125 Is Used
Heavy-Duty Stamping
Provides the 6136 N push force at 0.5 MPa required for metal forming, riveting, and heavy assembly press operations.
Injection Molding Extraction
Utilizes the SUS304 stainless steel rod to reliably eject finished plastic parts while resisting mold-release chemical exposure.
Pallet Diverting
Drives robust routing arms on high-mass conveyor lines, moving heavy pallets with precise 125 mm actuation.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX125 the Right Cylinder?
Choose this 125 mm bore when 100 mm (3927 N push at 0.5 MPa) lacks the necessary power, but avoid stepping up to the massive 160 mm bore (10053 N) unless absolutely required for extreme loads. The 125 mm stroke keeps the rod fully supported, minimizing bearing wear compared to longer extensions. Operating speed ranges from 30-500 mm/s.
To replace an existing cylinder, verify the 125 mm bore, 125 mm stroke, G1/2 port size, and mounting accessory type (such as LB foot or TC trunnion). Because this model lacks a magnet (-S), it cannot support CMSE or DMSE sensor switches; if position feedback is needed, select a magnet-equipped version. Remember that standard double-acting cylinders drift when air is removed; utilize a SAIL variant if the load must be mechanically locked in place.
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 SAI125BX125 FAQ
At 0.5 MPa operating pressure, the SAI125X125 generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X125 is dimensionally interchangeable per ISO 15552 standards. Ensure your existing setup matches the 125mm bore, 125mm stroke, G1/2 port, and mounting interface for a drop-in replacement.
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