Airtac SAI40 Standard Air Cylinder SAI40X185
The AirTAC Airtac SAI40 Standard Air Cylinder SAI40X185 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 185mm 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
- Stroke185 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 SAI40X185
The AirTAC SAI40X185 is a double-acting ISO 15552 profile cylinder featuring a 40mm bore and a 185mm stroke. Because 185mm is a non-standard made-to-order stroke outside the typical standard increments, it provides exact reach for specialized mid-stroke travel requirements. It generates 628N of push force and 528N of pull force at 0.5 MPa, making it well-suited for moderate industrial handling tasks.
This unit features a standard carbon steel piston rod and utilizes PT tapered port threads for secure pneumatic connections. The extruded aluminum barrel includes sensor grooves on both sides, allowing for direct mounting of CMSE or DMSE switches if a magnet is added later. For high-temperature environments up to 70 C, the standard TPU seals can be swapped for Viton (H) options.
Airtac SAI40 Standard Air Cylinder SAI40X185 Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40X185 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 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 SAI40X185
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×185 | 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 SAI40X185 Is Used
Package Diversion
Provides the 628N push force needed to actuate medium-weight package routing gates on sorting conveyors.
Clamp Actuation
Drives mid-sized clamping arms in CNC fixturing where a 185mm reach positions the workpiece accurately.
Pallet Stops
Functions as a pneumatic stop gate in pallet handling lines, extending 185mm to arrest incoming loads.
Is the Airtac SAI40 Standard Air Cylinder SAI40X185 the Right Cylinder?
Select this 40mm bore when a 32mm cylinder lacks sufficient thrust (402N at 0.5 MPa) or a 50mm bore is excessive (982N at 0.5 MPa). The 185mm stroke is non-standard, so ensure your machine envelope accommodates the exact extended length. For this specific stroke length, which approaches 300mm, evaluate the rod-bearing bending loads; using an external guide rail prevents side-load wear on the piston seals.
This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 profile cylinders with a 40mm bore, 185mm stroke, PT port thread, and matching mounting accessories like FA flanges or LB foot brackets. Note that a standard SAI does not hold its position if air pressure is lost; if your application requires dead-end locking without live pressure, consider the SAIL variant or an external pilot-operated check valve.
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 SAI40X185 FAQ
At 0.5 MPa operating pressure, the SAI40X185 provides 628N of push force and 528N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 879N.
Yes, the SAI40X185 is a true ISO 15552 profile cylinder. It is dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke, provided you match the PT port thread and mounting interface.
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