Airtac SAI40 Standard Air Cylinder SAI40BX20S
The AirTAC SAI40 Standard Air Cylinder SAI40BX20S 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 SAI40BX20S
The AirTAC SAI40X20-S is a double-acting ISO 15552 profile cylinder engineered for compact, high-cycle tasks. It provides a push force of 628 N and a pull force of 528 N at 0.5 MPa. The 20 mm stroke is optimal for short clamping or ejecting operations where space is tightly constrained.
This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance and a built-in magnet for use with CMSE or DMSE sensor switches. It features PT tapered port threads and utilizes a standard G1/4 air connection, ensuring seamless integration into existing pneumatic setups.
Airtac SAI40 Standard Air Cylinder SAI40BX20S Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40BX20S |
|---|---|
| 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 SAI40BX20S
| 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 SAI40BX20S Is Used
Short-Stroke Clamping
Ideal for securing lightweight components during machining or assembly, utilizing its 628 N push force to hold parts firmly in fixed jigs.
Product Ejection
Provides rapid, repetitive ejection of small goods from conveyor lines into packaging stations without requiring excessive spatial clearance.
Gate Diversion
Actuates small diverter gates on automated material handling tracks, using the integrated magnet to confirm gate position via DMSE sensors.
Is the Airtac SAI40 Standard Air Cylinder SAI40BX20S the Right Cylinder?
Select this 40 mm bore unit when a 32 mm bore (offering 402 N push at 0.5 MPa) lacks the necessary power, but a 50 mm bore (982 N push) would be physically too large. The 20 mm stroke excels in rapid, short-throw automation. Because the stroke is brief, rod-bearing side-load bending is minimal.
For applications requiring the piston to maintain its position after air pressure is removed or exhausted, a standard SAI cylinder will drift. In those scenarios, specify the SAIL variant with an air-released lock or utilize an external pilot-operated check valve. This SAI40X20-S is dimensionally interchangeable per ISO 15552, accepting standard FA, LB, or TC mounting accessories.
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 SAI40BX20S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder generates a push force of 628 N and a pull force of 528 N. If pressure is increased to 0.7 MPa, the push force rises to 879 N.
Yes, the SAI40X20-S is a true ISO 15552 profile cylinder, making its mounting dimensions a direct replacement for other ISO 15552 cylinders. You can easily swap it using standard FA flange or LB foot brackets.
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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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