Airtac SAI125 Standard Air Cylinder SAI125BX45S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX45S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX45S
The AirTAC SAI125X45-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty tasks, providing a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. Because this specific 45 mm stroke falls outside the standard manufactured increments, it is produced as a made-to-order unit to fit exact machine spacing constraints.
Built with a SUS304 stainless steel rod (option B) for superior corrosion resistance, this model includes an integrated magnet (-S) to seamlessly trigger CMSE or DMSE sensor switches along the dual-side barrel grooves. It features adjustable air cushions at both ends and operates at speeds of 30-500 mm/s.
Airtac SAI125 Standard Air Cylinder SAI125BX45S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX45S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAI125BX45S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAI125BX45S Is Used
Heavy-Duty Pressing
Ideal for compact pressing and stamping stations needing high force over a very short travel distance.
Rugged Clamping
Provides robust holding power for securing large metal or composite workpieces during machining.
Short-Stroke Ejection
Perfect for high-force part ejection from molds or dies where only a brief 45 mm push is required.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX45S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the necessary thrust for high-load automation. If you need a longer standard reach, stepping up to a 150 mm or 160 mm stroke provides greater travel. For this non-standard 45 mm stroke, ensure your cad design accounts for the PT tapered port threads and the M27x2 rod thread.
Because the stroke is short, side-load stress on the rod bearing is minimal. However, remember that standard double-acting cylinders do not hold position unpowered; if your fixture drops when air is exhausted, specify the SAIL variant with an air-released lock or the BSAI clamp-lock cylinder.
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 SAI125BX45S FAQ
At 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI series features a true ISO 15552 mounting interface, making it dimensionally interchangeable with other ISO 15552 profile cylinders of the same bore size, including foot, flange, and trunnion mounts.
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