Airtac SAID40 Double Rod Cylinder SAID40AX20S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX20S 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
About the Airtac SAID40 Double Rod Cylinder SAID40AX20S
The AirTAC SAID40X20-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a short 20mm stroke. Because the piston rod extends from both end covers, the effective annulus area is identical on extend and retract. This provides an equal force of 528N in both directions at 0.5MPa, ensuring perfectly symmetric motion for demanding transfer tasks.
Equipped with a -S magnet, this unit supports AirTAC CMSE reed and DMSE electronic sensors for dual-side position feedback. The rod is constructed from SUS420J2 stainless steel (option A) for enhanced corrosion resistance, and fluid enters via PT tapered ports. The rear rod end can drive a secondary mechanism or cam while maintaining superior anti-rotation guidance compared to a single-rod SAI.
Airtac SAID40 Double Rod Cylinder SAID40AX20S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX20S |
|---|---|
| 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 SAID40 Double Rod Cylinder SAID40AX20S
| 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 SAID40 Double Rod Cylinder SAID40AX20S Is Used
Symmetric Transfer
Drives parts across a conveyor with identical 528N force and speed in both directions, preventing jerky stops on short 20mm strokes.
Twin-Station Actuation
Uses the front rod to clamp a workpiece while the rear rod simultaneously triggers a pneumatic limit valve or mechanical cam.
Anti-Rotation Slides
The dual through-rods keep the attached tooling perfectly guided against torsional side loads during precise handling operations.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX20S the Right Cylinder?
Select this 40mm bore when an application demands equal push and pull forces, specifically 528N at 0.5MPa, within a very compact 20mm stroke envelope. If your project requires less force, the 32mm bore offers 345N both ways; for heavier symmetric loads, stepping up to the 50mm bore yields 825N. The twin-rod design inherently resists torsion and provides dual-side guidance, making it preferable over a standard single-rod cylinder for guided slides.
As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a drop-in replacement for other standard double-rod actuators. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that the adjustable air cushions only decelerate the piston near stroke end; this cylinder will not hold a load if air pressure is lost. For dead-load holding, consider an external pilot-operated check valve or the BSAID clamp-lock series.
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 SAID40 Double Rod Cylinder SAID40AX20S FAQ
Because it is a double-rod cylinder, the push and pull forces are equal. It generates 528N in both directions at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa.
Yes. The SAID40X20-S is an extruded aluminum profile cylinder with standard ISO 15552 mounting dimensions, making it a direct drop-in replacement for equivalent ISO 15552 double-rod cylinders.
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