Airtac SAI40 Standard Air Cylinder SAI40X250
The AirTAC Airtac SAI40 Standard Air Cylinder SAI40X250 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 SAI40X250
The AirTAC SAI40X250 is a double-acting ISO 15552 profile cylinder featuring a 40mm bore and 250mm stroke. It generates 628N of push force at 0.5 MPa, making it well-suited for mid-range linear actuation tasks. The extruded aluminum barrel design omits tie-rods, providing a clean exterior that drops directly into standard ISO 15552 mounting footprints.
This configuration uses a standard carbon steel piston rod and PT tapered port threads. Because it lacks a magnet, external position sensing relies on mechanical stops rather than onboard switches. For environments exceeding standard temperature limits, the cylinder can be specified with Viton (H) seals to maintain thermal stability up to the rated maximum.
Airtac SAI40 Standard Air Cylinder SAI40X250 Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40X250 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAI40X250
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SAI40X250 Is Used
Package Sorting Diverter
Pushes medium-weight cartons off a main conveyor belt using 879N of thrust at 0.7 MPa, handling the 250mm travel distance efficiently.
Clamping Fixture
Secures workpieces in a CNC machining station, utilizing the carbon steel rod for rigid holding during light milling or drilling operations.
Pallet Stop Gate
Acts as a pneumatic stop mechanism in a pallet flow system, extending 250mm to halt incoming pallets at a designated workstation.
Is the Airtac SAI40 Standard Air Cylinder SAI40X250 the Right Cylinder?
Select this 40mm bore when an application requires more power than a 32mm variant (which provides 402N at 0.5 MPa) but does not warrant the physical size of a 50mm unit. With a 250mm stroke, the extended rod is susceptible to bending under lateral loads; utilizing an external guide rail or a dedicated guided cylinder prevents rod-bearing damage and premature wear.
If the machinery loses air pressure, this standard SAI cylinder cannot hold its load and will drift. Use the SAIL variant with an air-released lock or an external pilot check valve for fail-safe position holding. To match this exact unit for a replacement, specify: 40mm bore, 250mm stroke, G1/4 port, PT thread, no magnet, and your required ISO 15552 mounting accessory (such as an LB foot or TC trunnion).
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 SAI40X250 FAQ
At 0.5 MPa it provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
Yes, the SAI40X250 is dimensionally interchangeable with other ISO 15552 profile cylinders. Ensure you match the 40mm bore, 250mm stroke, and G1/4 port size during installation.
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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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