Airtac SAID40 Double Rod Cylinder SAID40X50S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X50S
The AirTAC SAID40X50-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 50mm stroke. Because the piston rod extends from both end covers, the effective annulus area is identical on both sides, yielding exactly 528N of force in both extend and retract directions at 0.5 MPa. The integrated magnet (-S) enables position detection along the extruded aluminum barrel grooves.
This configuration uses a standard carbon steel rod and PT G1/4 tapered ports. The rear rod extension is ideal for mounting a secondary cam, a position flag, or driving a second mechanism, providing superior anti-rotation guidance compared to a single-rod SAI cylinder.
Airtac SAID40 Double Rod Cylinder SAID40X50S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAID40X50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SAID40X50S Is Used
Symmetric Transfer
Drives a transfer shuttle with identical 528N force and speed in both directions, ensuring perfectly balanced push and pull dynamics.
Anti-Rotation Slide
The twin-rod architecture keeps the workpiece guided and prevents unwanted rotation during vertical or horizontal clamping tasks.
Rear-Flag Sensing
Mounts a physical limit flag on the rear rod end to trigger external CMSE or DMSE sensors independently from the front tooling.
Is the Airtac SAID40 Double Rod Cylinder SAID40X50S the Right Cylinder?
Select this 40mm bore when an application requires 528N of symmetric force both ways, stepping up from the 32mm bore (345N) if your load demands more thrust, or stepping down from the 50mm bore (825N) to save space. The twin-rod design is chosen over a single-rod SAI when you need dual-side guidance to prevent rotation or require rear-rod sensing. To match this cylinder for an ISO 15552 drop-in replacement, specify the 40mm bore, 50mm stroke, PT G1/4 port, and the -S magnet option.
Note that the adjustable air cushions only decelerate the piston near stroke end and do not hold the load if air pressure is lost; for position holding without live pressure, consider an external rod lock or the BSAID clamp-lock variant. Since the stroke is 50mm, side-load stress on the rod bearing is minimal, but ensure you have adequate rear clearance for the through-rod protrusion.
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 SAID40X50S FAQ
Because it is a double-rod cylinder, the force is equal in both directions due to the matching annulus areas. It provides 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extend and retract strokes.
Yes, the SAID40X50-S is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 double-rod cylinders, maintaining the same mounting footprint and PT G1/4 port interface.
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