Airtac SAID40 Double Rod Cylinder SAID40AX20
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX20 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 SAID40AX20
The AirTAC SAID40X20 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and a 20mm non-standard stroke. Because the piston rod extends from both end covers, the annulus area is identical on both sides, yielding exactly 528 N of force in both extend and retract directions at 0.5 MPa. This symmetric output is perfect for applications requiring perfectly balanced motion.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic switches on either end to track the rear rod position. It uses PT tapered port threading and adjustable air cushions at both ends to decelerate the piston smoothly.
Airtac SAID40 Double Rod Cylinder SAID40AX20 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX20 |
|---|---|
| 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 SAID40AX20
| 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 SAID40AX20 Is Used
Symmetric Force Transfer
Drives a transfer carriage where the push and pull forces must be perfectly matched at 528 N, preventing jerky movements during direction reversal.
Twin-Station Actuation
Uses the front rod to push a part while the rear rod simultaneously triggers a mechanical limit valve or operates a secondary mechanism in parallel.
Anti-Rotation Slides
The dual through-rods provide superior torsional rigidity, guiding the attached load against rotation without needing external linear bearings.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX20 the Right Cylinder?
Choose this 40mm bore double-rod cylinder when your mechanism requires equal push and pull forces, superior anti-rotation guidance, or a rear rod end to drive a secondary cam. If your application needs less force, stepping down to the 32mm bore yields 345 N both ways at 0.5 MPa; stepping up to the 50mm bore provides 825 N. The SAID series uses a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It deliberately omits the FB, CA, CB, and CR accessories found on single-rod SAI models.
Because this is a 20mm stroke, it falls outside the standard stroke list and is manufactured as a made-to-order item. Note that a plain SAID cylinder does not hold its position if air pressure is lost; it will drift. If your application requires load holding upon exhaust, consider the SAIL lock variant or an external pilot-operated check valve. This cylinder is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders.
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 SAID40AX20 FAQ
Because it is a double-rod cylinder, the effective piston area is the same on both sides. It delivers an equal force of 528 N in both the extend and retract directions at 0.5 MPa (739 N at 0.7 MPa).
Yes, the SAID40X20 is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 double-rod profile cylinders, provided your mounting hardware matches the Basic, FA, LB, or TC interfaces.
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