Airtac SAI40 Standard Air Cylinder SAI40BX20
The AirTAC SAI40 Standard Air Cylinder SAI40BX20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 SAI40BX20
The AirTAC SAI40X20 is a double-acting ISO 15552 profile cylinder engineered for compact actuation, delivering 628N of push force at 0.5 MPa. Its 20mm stroke is optimal for short-travel clamping and ejection tasks. The extruded aluminum barrel design omits tie rods, providing a clean exterior that resists debris accumulation.
This specific configuration features a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in washdown or mildly chemical environments. It utilizes PT tapered port threads and lacks a standard magnet (-S), focusing purely on mechanical actuation without sensor feedback requirements.
Airtac SAI40 Standard Air Cylinder SAI40BX20 Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40BX20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 SAI40BX20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 SAI40BX20 Is Used
Short-Stroke Clamping
Ideal for holding workpieces securely during machining or assembly operations where a 20mm stroke provides rapid, high-force clamping.
Parts Ejection
Delivers 628N of push force at 0.5 MPa to quickly eject finished parts from molds or press lines in high-cycle automated environments.
Packaging Diverters
The SUS304 rod offers excellent corrosion resistance, making it suitable for diverting cartons or products in washdown packaging lines.
Is the Airtac SAI40 Standard Air Cylinder SAI40BX20 the Right Cylinder?
Selecting this 40mm bore over the smaller 32mm bore (402N at 0.5 MPa) provides a 56% increase in thrust, making it better suited for higher-force short-stroke operations. If less force is needed, the 32mm bore offers a lighter footprint. The PT porting ensures a robust, sealed connection in pneumatic systems.
Because the 20mm stroke is extremely short, side-load bending is negligible, and standard rod bearing wear is minimal. Note that this standard SAI cylinder relies on live air pressure to maintain position; if air is exhausted, the load will drift. For fail-safe load holding, consider the SAIL (air-released lock) variant or an external pilot-operated check valve. As an ISO 15552 profile cylinder, it serves as a direct replacement for other ISO 15552 cylinders.
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 SAI40BX20 FAQ
At 0.5 MPa operating pressure, the SAI40X20 generates 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
Yes, the SAI40X20 is a genuine ISO 15552 profile cylinder with standardized mounting dimensions, making it dimensionally interchangeable with other ISO 15552 cylinders.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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