Airtac SAID40 Double Rod Cylinder SAID40X40
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X40
The AirTAC SAID40X40 is a double-acting, double-rod ISO 15552 profile cylinder where a single piston drives a carbon steel rod out of both end covers. Because the rod occupies both sides of the piston, the annulus area is identical in each direction, yielding an equal extend and retract force of 528 N at 0.5 MPa (or 739 N at 0.7 MPa). This symmetric output is ideal for twin-station actuation and maintaining precise motion control.
The through-rod design allows mounting a primary workpiece on one end and a position flag, cam, or secondary tool on the rear end. It features an extruded aluminum barrel with sensor grooves on both sides, uses a PT G1/4 port, and includes adjustable air cushions at both ends to decelerate the load near stroke limits.
Airtac SAID40 Double Rod Cylinder SAID40X40 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAID40X40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SAID40X40 Is Used
Symmetric Force Transfer
Transfers parts between two stations with identical 528 N push and pull force at 0.5 MPa, ensuring consistent placement speed regardless of travel direction.
Anti-Rotation Slides
The twin-rod architecture prevents piston rotation, making it ideal for guiding vertical lifting slides or external fixtures that require strict linear stability.
Rear-End Sensing
Mounts the primary workpiece on the front rod while using the rear rod extension to carry a cam or limit flag for dual-side mechanism tracking.
Is the Airtac SAID40 Double Rod Cylinder SAID40X40 the Right Cylinder?
Choose this 40mm bore when an application demands equal push and pull forces (528 N both ways at 0.5 MPa) and superior anti-rotation guidance compared to a single-rod SAI. If your project requires less force, the 32mm bore provides 345 N both ways; if you need higher thrust, step up to the 50mm bore which provides 825 N. Because this is a double-rod cylinder, the overall length is longer than a single-rod unit, meaning you must account for rear-rod protrusion clearance in your machine layout.
This model uses a PT G1/4 port and a standard 40mm stroke. The mounting interface is dimensionally interchangeable per ISO 15552, utilizing a reduced accessory set (Basic, FA, LB, TC, FTC, TCM1, TCM2) that omits FB, CA, CB, and CR. Note that a plain SAID does not hold its load when air is exhausted or the valve is centered; the piston will drift. For position holding without live pressure, consider an external rod lock or a related type like BSAID.
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 SAID40X40 FAQ
Because the rod exits both ends, the effective piston area is the same in both directions. The force is equal for extension and retraction: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X40 is dimensionally interchangeable per ISO 15552 and serves as a drop-in replacement for other ISO 15552 double-rod profile cylinders, using the standard PT G1/4 port and standard mounting dimensions.
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