Airtac SAID40 Double Rod Cylinder SAID40X425S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X425S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 425mm 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
- Stroke425 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X425S
The AirTAC SAID40X425-S is a double-acting, double-rod ISO 15552 profile cylinder. Because a carbon steel rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528N output force in either direction at 0.5 MPa. The integrated -S magnet pairs directly with AirTAC CMSE reed and DMSE solid-state switches mounted in the dual sensor grooves.
This through-rod design allows you to mount the primary workpiece on one end while attaching a cam, position flag, or secondary mechanism to the rear rod. The twin-rod architecture provides superior anti-rotation guidance compared to a single-rod SAI, and the extruded aluminum barrel ensures it is dimensionally interchangeable with other ISO 15552 cylinders.
Airtac SAID40 Double Rod Cylinder SAID40X425S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X425S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 425 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 SAID40X425S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×425 | 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 SAID40X425S Is Used
Symmetric Force Transfer
Drives a transfer carriage with identical 528N push and pull forces, ensuring consistent acceleration and deceleration without pressure imbalance.
Rear-Rod Position Sensing
Utilizes the rear rod extension to mount a physical cam flag, triggering AirTAC DMSE solid-state sensors independently of the primary front-side tool.
Anti-Rotation Slides
Lifts and lowers a guided vertical stopper plate using the twin-rod geometry to prevent mechanical binding and rotation during heavy vertical strokes.
Is the Airtac SAID40 Double Rod Cylinder SAID40X425S the Right Cylinder?
Select this 40mm bore when an application requires 528N of symmetric push and pull force at 0.5 MPa, or step down to a 32mm bore (345N) for lighter loads. The 425mm stroke falls within the standard 1200mm limit for this bore, operating at speeds of 30-800 mm/s. The G1/4 port and PT tapered threads are fixed by the bore size. Mounting options include the SAID-specific set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting single-rod FB/CA/CB/CR brackets).
Because the 425mm stroke is quite long, the unsupported rod mass increases the risk of side-load bending; utilizing an external guide is strongly recommended to prevent premature rod-bearing wear. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end and do not hold the load if air pressure is lost—consider a SAIL or BSAID cylinder if position holding is required.
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 SAID40X425S FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the output force is identical in both directions. It provides 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa.
Yes, as an ISO 15552 profile cylinder, it is dimensionally interchangeable with other standard ISO 15552 double-rod cylinders using the standard mounting interface, without claiming to be a specific brand's proprietary part.
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