Airtac SAI40 Standard Air Cylinder SAI40X290S
The AirTAC Airtac SAI40 Standard Air Cylinder SAI40X290S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 290mm 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
- Stroke290 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 SAI40X290S
The AirTAC SAI40X290-S is a double-acting ISO 15552 profile cylinder featuring a 40mm bore and 290mm stroke. It provides a robust push force of 879N at 0.7 MPa, making it well-suited for medium-duty handling and positioning tasks. The extruded aluminum barrel omits tie-rods, presenting a clean exterior that drops directly into existing ISO 15552 mounting interfaces.
Equipped with a magnetic piston (-S), this unit supports direct mounting of CMSE or DMSE sensor switches along the dual grooves on the barrel. The standard carbon steel piston rod ensures durable performance, while the PT tapered port threads guarantee a reliable, leak-free pneumatic connection.
Airtac SAI40 Standard Air Cylinder SAI40X290S Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40X290S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 290 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 SAI40X290S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×290 | 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 SAI40X290S Is Used
Material Ejection
Provides the 879N force needed to positively eject machined aluminum parts from a fixture at the end of a CNC cycle.
Package Diverting
Actuates a diverter arm on a packaging line, using the 290mm stroke to push standard cartons cleanly to a secondary belt.
Pallet Loading
Extends to position lightweight sheet materials into vertical pallet stacking frames without tying up robotic manipulators.
Is the Airtac SAI40 Standard Air Cylinder SAI40X290S the Right Cylinder?
Providing 628N of push force at 0.5 MPa, this model is a solid step up from the 32mm bore (402N) when slightly higher work output is required without jumping to the 50mm class (982N). For this 290mm stroke, the extended rod is vulnerable to bending under side loads; utilizing an external guide rail or a guided cylinder carriage is strongly recommended to prevent premature rod-bearing wear.
This cylinder relies on live air pressure to maintain its position; if air is lost or the valve is centered, the load will drift. The adjustable air cushions at both ends only decelerate the piston near the stroke limits and do not function as a holding brake. As a dimensionally interchangeable ISO 15552 unit, it matches standard 40mm bore, 290mm stroke, PT G1/4 port, and LB/FA/TC mounting accessories perfectly.
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 SAI40X290S FAQ
At a standard operating pressure of 0.7 MPa, the SAI40X290-S generates 879N of push force and 724N of pull force.
No, the standard SAI cylinder does not hold position without constant air pressure. The adjustable cushions only slow the piston at stroke ends. For dead-load holding, consider the SAIL or BSAI locking variants.
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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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