Airtac SAID40 Double Rod Cylinder SAID40AX650S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX650S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 650mm 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
- Stroke650 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX650S
The AirTAC SAID40X650-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 650mm 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 ideal for mechanisms requiring consistent push and pull dynamics.
Equipped with a -S magnet, this unit directly supports AirTAC CMSE reed and DMSE solid-state electronic sensors via the dual-side barrel grooves. The rod is constructed from SUS420J2 stainless steel for superior corrosion resistance, and the rear protruding rod end can independently carry a secondary cam, position flag, or guide mechanism.
Airtac SAID40 Double Rod Cylinder SAID40AX650S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX650S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 650 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 SAID40AX650S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×650 | 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 SAID40AX650S Is Used
Symmetric Transfer Unit
Drives a dual-sided material transfer carriage where the equal 528 N extend and retract forces ensure smooth, consistent part placement without speed variations.
Anti-Rotation Slide
The through-rod design prevents piston rotation during the 650mm traverse, maintaining precise angular alignment for downstream assembly tooling.
Rear-Flag Sensing
Utilizes the -S magnet with DMSE solid-state sensors on the rear protruding rod end to trigger secondary operations without interfering with the primary workpiece.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX650S the Right Cylinder?
Select this 40mm bore model when an application demands equal force both ways (528 N at 0.5 MPa) and requires a long 650mm stroke. Stepping up to the 50mm bore raises that symmetric output to 825 N, while dropping to the 32mm bore reduces it to 345 N. The twin-rod design is chosen over a single-rod SAI when the mechanism needs dual-side guidance, anti-rotation stability, or rear-rod position sensing.
At 650mm of travel, the unsupported stroke is significant; to prevent rod-bearing bending and premature wear under side loads, always use an external linear guide. This cylinder uses PT tapered port threads (G1/4) and the standard SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold the load. If pressure is lost, the cylinder drifts, so use a SAIL lock or BSAID clamp-lock for position holding.
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 SAID40AX650S FAQ
Because the rod exits both ends, the effective piston area is the same in both directions. It delivers an equal 528 N of force at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extend and retract strokes.
Yes, the SAID40X650-S is dimensionally interchangeable per ISO 15552 standards. It serves as a drop-in replacement for other ISO 15552 profile-type double-rod cylinders, utilizing the same mounting interface dimensions and PT G1/4 ports.
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