Airtac SAI125 Standard Air Cylinder SAI125BX450
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX450 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX450
The AirTAC SAI125X450 is a double-acting ISO 15552 profile cylinder engineered to deliver 6136 N of push force at 0.5 MPa and 8590 N at 0.7 MPa. This 125 mm bore unit is built to handle heavy-duty automation tasks requiring a 450 mm stroke. Its extruded aluminum barrel omits traditional tie-rods, presenting a clean, standardized ISO mounting interface for seamless integration.
This specific configuration features a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh or washdown environments. It utilizes PT tapered port threads, and because it lacks the -S magnet suffix, it is optimized purely for mechanical actuation without sensor groove integration requirements. For applications needing position holding without air pressure, consider the SAIL variant with an air-released lock.
Airtac SAI125 Standard Air Cylinder SAI125BX450 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX450 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAI125BX450
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAI125BX450 Is Used
Heavy Metal Stamping
Provides the robust 6136 N thrust at 0.5 MPa required to actuate large mechanical stamping presses and heavy-duty forming dies.
Lumber Processing
The SUS304 stainless steel rod withstands harsh, high-particulate sawmill environments while driving 450 mm log positioning gates.
Palletizer Actuation
Drives the main lift and position mechanisms on automated palletizing lines where high force and long travel are mandatory.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX450 the Right Cylinder?
Select this 125 mm bore model when a 100 mm bore (3927 N at 0.5 MPa) lacks the necessary thrust for your heavy loads, or step down to the 100 mm option if 6136 N is excessive. At a 450 mm stroke, the unsupported rod is highly susceptible to bending under side loads; utilize an external guide rail or a guided cylinder to prevent premature rod-bearing wear.
Because the standard SAI is double-acting, it relies on live air pressure to hold position and will drift if supply is lost. This model is dimensionally interchangeable per ISO 15552 standards, meaning it serves as a direct drop-in replacement for other ISO 15552 profile cylinders with identical 125 mm bore, 450 mm stroke, PT port, and standard mounting accessory dimensions.
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 SAI125BX450 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X450 is a true ISO 15552 profile cylinder. It is dimensionally interchangeable with other ISO 15552 standard cylinders of the same bore and stroke, provided your mounting accessories and PT porting align.
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