Airtac SAID40 Double Rod Cylinder SAID40AX25
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX25 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX25
The AirTAC SAID40X25 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 25mm stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding exactly 528 N of force each way at 0.5 MPa (739 N at 0.7 MPa). This symmetric output is ideal for twin-station actuation and anti-rotation slides.
This specific configuration features an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It uses PT tapered port threads, and because no magnet is specified, it does not carry internal magnetic pistons for position sensing. The extruded aluminum barrel includes sensor grooves on both sides, and adjustable air cushions at both ends decelerate the piston near stroke end without acting as a lock.
Airtac SAID40 Double Rod Cylinder SAID40AX25 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX25 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 SAID40AX25
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 SAID40AX25 Is Used
Symmetric Force Transfer
Drives a transfer mechanism where the matching 528 N extend and retract forces at 0.5 MPa ensure consistent, balanced motion without speed shifts between strokes.
Anti-Rotation Slides
Utilizes the twin rods exiting both covers to guide a heavy sliding fixture, preventing piston rotation and maintaining precise tool alignment over the 25mm stroke.
Dual-Side Actuation
Mounts the primary workpiece on the front rod end and a secondary cam or limit flag on the rear rod end to trigger external mechanical switches during the cycle.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX25 the Right Cylinder?
Choose this 40mm bore double-rod cylinder when an application demands equal push and pull forces, stepping up from the 32mm version (which provides 345 N both ways) or scaling down from the 63mm bore (1402 N both ways). A twin-rod design is preferred over a single-rod SAI when you need to mount a workpiece on one end and a cam, guide, or position flag on the rear rod end to prevent rotation. For this short 25mm stroke, side-load stress on the rod bearing is minimal, but always verify load alignment.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders, utilizing a G1/4 port and PT thread type. It supports the reduced SAID mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that a plain SAID does not hold its position if air pressure is lost; for dead-end holding, consider an external rod lock or the SAIL/BSAID variants.
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 SAID40AX25 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the push and pull forces are equal. It generates 528 N in both directions at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X25 is a profile-type extruded aluminum cylinder built to ISO 15552 mounting dimensions, making it a drop-in replacement for other ISO 15552 double-rod cylinders. It uses a G1/4 port and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mountings.
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