Airtac SAI40 Standard Air Cylinder SAI40X55S
The AirTAC Airtac SAI40 Standard Air Cylinder SAI40X55S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 55mm 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
- Stroke55 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 SAI40X55S
The AirTAC SAI40X55-S is a double-acting ISO 15552 profile cylinder featuring a 40mm bore and a 55mm stroke. It delivers a robust 628N of push force and 528N of pull force at 0.5 MPa, making it an excellent fit for compact automation tasks requiring mid-range thrust. The extruded aluminum barrel design omits tie rods, providing a clean exterior that is fully interchangeable with other ISO 15552 mounting interfaces.
This variant includes a built-in magnet for seamless position detection using CMSE or DMSE series switches, which seat directly into the sensor grooves machined on both sides of the barrel. The standard piston rod is crafted from carbon steel, while the TPU seals ensure reliable operation across the 30-800 mm/s speed range. For applications demanding higher thermal resistance, Viton (H) or NBR (N) seal options are available upon request.
Airtac SAI40 Standard Air Cylinder SAI40X55S Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40X55S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAI40X55S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SAI40X55S Is Used
Component Clamping
Ideal for securing medium-weight workpieces during machining or assembly, utilizing its 628N push force to hold parts firmly in place.
Package Diverting
The 55mm stroke provides the precise extension needed to actuate sorting gates or pusher arms on packaging lines without occupying excessive space.
Material Ejection
Well-suited for ejecting processed goods or small parts from machinery bases, offering rapid cycling thanks to the 30-800 mm/s speed capability.
Is the Airtac SAI40 Standard Air Cylinder SAI40X55S the Right Cylinder?
Selecting this 40mm bore over the smaller 32mm version increases your 0.5 MPa push thrust from 402N to 628N, providing a noticeable power upgrade for slightly heavier mechanisms. Conversely, if your application requires less force, the 32mm bore offers a more compact footprint. The 55mm stroke is ideal for short, rapid movements. Because the stroke is well under 300mm, side-load stress on the rod bearing is minimal, though standard shaft alignment practices should still be observed.
As a true ISO 15552 profile cylinder, this model serves as a drop-in replacement for any standard ISO 15552 unit with a 40mm bore, 55mm stroke, and G1/4 PT tapered port. It supports standard mounting accessories like LB foot brackets or FA flanges. Remember that the standard adjustable air cushions only decelerate the piston near the stroke ends; they do not hold a load. If your system loses air pressure, the rod will drift. For dead-stop holding, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants.
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 SAI40X55S FAQ
At a standard operating pressure of 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 879N.
Yes, the SAI40X55-S is a genuine ISO 15552 profile cylinder. It is dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke, utilizing a standard G1/4 PT port and standard mounting interfaces.
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