Airtac SAI40 Standard Air Cylinder SAI40X20S
The AirTAC Airtac SAI40 Standard Air Cylinder SAI40X20S 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- 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 SAI40X20S
The AirTAC SAI40X20-S is a double-acting ISO 15552 profile cylinder engineered for short-stroke automation. It generates 628 N of push force at 0.5 MPa, extending 20 mm to execute rapid clamping or ejecting tasks. The extruded aluminum barrel design omits tie rods, providing a clean exterior that drops directly into standard ISO 15552 mounting footprints.
Equipped with a sensor magnet (-S), this unit supports CMSE and DMSE reed switches via dual grooves machined into the barrel. The standard carbon steel piston rod ensures robust mechanical strength, while the tapered PT port thread guarantees a secure, leak-free pneumatic connection in high-cycle environments.
Airtac SAI40 Standard Air Cylinder SAI40X20S Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40X20S |
|---|---|
| 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 SAI40X20S
| 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 SAI40X20S Is Used
Short-Stroke Clamping
Ideal for securing small workpieces during machining, utilizing the 20 mm stroke to cycle rapidly without occupying excessive fixture space.
Package Ejector
Provides the precise 628 N push at 0.5 MPa needed to knock lightweight cartons off a production line at high speeds.
Valve Actuation
Delivers dependable linear motion to trigger mechanical valves or diverters in compact pneumatic control panels.
Is the Airtac SAI40 Standard Air Cylinder SAI40X20S the Right Cylinder?
Select this 40 mm bore when an application requires 628 N of thrust at 0.5 MPa but lacks the physical envelope for a 50 mm bore, which offers 982 N. If your payload is lighter, stepping down to a 32 mm bore yields 402 N and saves valuable space. Because the stroke is only 20 mm, rod-bearing side loading is minimal and does not require external guides.
For drop-in replacements, match the 40 mm bore, 20 mm stroke, G1/4 port, and desired mounting accessory like an FA flange or LB foot. Remember that standard air cushions only decelerate the piston near the end of travel; they do not hold a load vertically if air pressure is lost. Use a SAIL locking variant if static position holding is required.
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 SAI40X20S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder produces 628 N of push force and 528 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 879 N.
Yes, it shares the exact ISO 15552 mounting interface dimensions, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders. Ensure your setup matches the G1/4 port and 20 mm stroke requirements.
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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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