Airtac SAI40 Standard Air Cylinder SAI40BX185
The AirTAC SAI40 Standard Air Cylinder SAI40BX185 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 185mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke185 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAI40 Standard Air Cylinder SAI40BX185
The AirTAC SAI40X185 is a double-acting ISO 15552 profile cylinder offering a push force of 628 N and a pull force of 528 N at 0.5 MPa. This 40 mm bore, 185 mm stroke unit features adjustable pneumatic cushioning at both ends to manage impact energies effectively.
Built with a SUS304 stainless steel piston rod (option B), this model is highly resistant to corrosion, making it suitable for environments where moisture or washdowns are a concern. It utilizes PT tapered port threads and integrates dual sensor grooves along the extruded aluminum barrel for straightforward position feedback.
Airtac SAI40 Standard Air Cylinder SAI40BX185 Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40BX185 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI40 Standard Air Cylinder SAI40BX185
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×185 | 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 SAI40 Standard Air Cylinder SAI40BX185 Is Used
Package Diverting
Provides the precise linear motion needed to actuate diverters on packaging lines, easily handling medium-weight cartons with its 628 N push force at 0.5 MPa.
Clamping Fixtures
Ideal for securing workpieces during light machining or assembly operations, where the SUS304 rod offers reliable performance against minor environmental moisture.
Vertical Lift Gates
Drives small access gates and safety barriers in material handling zones, utilizing its 185 mm stroke to create sufficient clearance for product flow.
Is the Airtac SAI40 Standard Air Cylinder SAI40BX185 the Right Cylinder?
Selecting this 40 mm bore provides a balanced output of 879 N at 0.7 MPa, sitting comfortably between the lighter 32 mm bore (563 N) and the heavier 50 mm bore (1374 N) options. This makes the SAI40X185 an excellent choice for medium-duty handling tasks that do not require the bulk of a larger profile barrel.
Since this is a 185 mm stroke, side loading on the rod bearing remains relatively low, but always ensure proper alignment to prevent premature seal wear. Note that a standard double-acting cylinder cannot maintain its position if air pressure is lost; if your application requires dead-stop holding without live pressure, consider the BSAI clamp-lock variant or 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 SAI40 Standard Air Cylinder SAI40BX185 FAQ
At a standard 0.5 MPa operating pressure, this 40 mm bore cylinder generates a push force of 628 N and a pull force of 528 N. If you increase the pressure to 0.7 MPa, the push force rises to 879 N.
Yes, the SAI40X185 is dimensionally interchangeable per the ISO 15552 standard. It serves as a direct replacement for other ISO 15552 profile cylinders, matching standard mounting interface dimensions and utilizing a G1/4 port.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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