Airtac SAID40 Double Rod Cylinder SAID40AX650
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX650 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 SAID40AX650
The AirTAC SAID40X650 is a double-acting, double-rod ISO 15552 profile cylinder engineered for symmetric actuation. Because a rod exits both ends, the annulus area is identical on extend and retract, yielding an equal 528N of force in each direction at 0.5 MPa. This through-rod architecture is ideal for anti-rotation guidance and mounting secondary components.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic switches on whichever end best suits your layout.
Airtac SAID40 Double Rod Cylinder SAID40AX650 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX650 |
|---|---|
| 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 SAID40AX650
| 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 SAID40AX650 Is Used
Symmetric Transfer
Drives a workpiece forward and retracts it backward with identical 528N force, ensuring consistent speed and momentum for delicate part transfer.
Anti-Rotation Slide
The twin-rod design resists torsional twisting better than a single rod, providing stable linear guidance for precision sliding mechanisms.
Rear-Cam Actuation
Mounts a cam or limit flag on the protruding rear rod end to trigger secondary mechanisms or mechanical valves independently of the front tooling.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX650 the Right Cylinder?
Select this 40mm bore when an application requires matching push and pull dynamics, stepping up from a 32mm bore (345N both ways) or down from a 50mm bore (825N both ways). A double rod is preferred over a single-rod SAI when you need to drive a cam or position flag out the rear cover while maintaining superior resistance to torsional rotation.
For this 650mm stroke, the extended length is significantly longer than a single-rod variant because the rod protrudes from both end covers; ensure you have adequate rear clearance. At this length, the 16mm rod and M12x1.25 thread face increased bending moments under side loads, so an external guide rail is strongly recommended to prevent premature bearing wear. Note that the adjustable air cushions only decelerate the piston near stroke end and do not hold the load if air pressure is lost. As a dimensionally interchangeable ISO 15552 cylinder, it drops in seamlessly with standard mounting accessories (Basic, FA, LB, TC, FTC, TCM1, TCM2) and PT porting.
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 SAID40AX650 FAQ
Because it is a double-rod cylinder, the effective piston area is the same on both sides. It delivers an equal 528N of force in both extend and retract directions at 0.5 MPa (739N at 0.7 MPa).
Yes, the SAID40X650 is dimensionally interchangeable per ISO 15552. It uses a standard mounting interface (Basic, FA, LB, TC, FTC, TCM1, TCM2) and PT ports, allowing it to serve as a drop-in replacement for other ISO 15552 profile cylinders.
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