Airtac SAID40 Double Rod Cylinder SAID40AX240
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX240 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX240
The AirTAC SAID40X240 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 240mm stroke. Because a 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 ideal for mechanisms requiring consistent push and pull dynamics.
Equipped with a SUS420J2 stainless steel rod (option A), this variant offers enhanced corrosion resistance compared to standard carbon steel. It utilizes PT tapered port threads and includes adjustable air cushioning at both ends to absorb impact. The extruded aluminum barrel features sensor grooves on both sides, ready for CMSE reed or DMSE solid-state switches if a magnet is added later.
Airtac SAID40 Double Rod Cylinder SAID40AX240 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX240 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 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 SAID40AX240
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×240 | 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 SAID40AX240 Is Used
Symmetric Force Transfer
Drives a shuttle mechanism where the equal 528 N push and pull forces at 0.5 MPa ensure consistent momentum transfer without requiring pressure adjustments between strokes.
Anti-Rotation Slides
The twin-rod architecture inherently resists torsional twist, keeping guided slides perfectly aligned without the need for bulky external linear bearings.
Rear-Rod Cam Actuation
The protruding rear rod end operates a secondary mechanical valve or limit flag independently of the primary workpiece mounted on the front rod.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX240 the Right Cylinder?
Select this 40mm bore when an application demands equal force both ways, generating 528 N at 0.5 MPa or 739 N at 0.7 MPa. If your mechanism requires less force, the 32mm bore offers 345 N both ways, whereas the 50mm bore steps up to 825 N. The twin-rod design is chosen over a single-rod SAI when you need to mount a secondary cam, position flag, or external guide on the rear rod extension to prevent rotational twist.
This model uses PT ports and supports mountings from the reduced SAID set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). It is dimensionally interchangeable per ISO 15552 as a drop-in replacement for other standard profile double-rod cylinders. Note that a plain SAID does not hold its position if air pressure is lost; for load-holding safety, consider an SAIL lock or BSAID clamp-lock cylinder. At 240mm stroke, the unsupported rod length is moderate, but for any stroke over 300mm, an external guide is recommended to prevent rod-bearing bending under side loads.
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 SAID40AX240 FAQ
Because the double-rod design subtracts the rod area on both sides, the force is identical in both directions. It provides 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X240 is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other standard ISO 15552 double-rod cylinders of the same bore and stroke.
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