Airtac SAID40 Double Rod Cylinder SAID40AX25S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX25S 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 SAID40AX25S
The AirTAC SAID40X25-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40 mm bore and 25 mm stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528 N of force each way at 0.5 MPa. The -S suffix indicates an integrated magnet for position sensing with AirTAC CMSE reed or DMSE solid-state switches.
This through-rod configuration allows mounting a workpiece on the front and a cam or limit flag on the rear rod end. It uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and accepts adjustable air cushioning at both ends to decelerate the piston near stroke limits.
Airtac SAID40 Double Rod Cylinder SAID40AX25S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX25S |
|---|---|
| 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 SAID40AX25S
| 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 SAID40AX25S Is Used
Symmetric Force Transfer
Drives a reciprocating mechanism where the 528 N extend and retract forces must be perfectly balanced, preventing speed variations between directions.
Anti-Rotation Slides
Guides a heavy sliding fixture against rotation using twin rods exiting both covers, maintaining precise alignment over the 25 mm stroke.
Rear-rod Position Sensing
Mounts a cam or target on the rear rod end to trigger external sensors, keeping the primary front working area completely clear of obstructions.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX25S the Right Cylinder?
Select this 40 mm bore double-rod cylinder when an application requires equal push and pull forces (528 N at 0.5 MPa) and anti-rotation guidance that a single-rod SAI cannot provide. If you need less force, the 32 mm bore offers 345 N; if you need more, the 50 mm bore provides 825 N both ways. The PT port and G1/4 thread interface match standard ISO 15552 mounting dimensions.
Remember that the adjustable air cushion only decelerates the piston near stroke end; it does not hold a load. If your system loses air pressure, the piston will drift. For position holding without live pressure, consider an external rod lock or the related BSAID clamp-lock cylinder. Because the rod protrudes from the rear, ensure you have adequate clearance behind the rear cover.
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 SAID40AX25S FAQ
Because the rod occupies both sides of the piston, the effective area is the same in both directions. It provides an equal push and pull force of 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X25-S is dimensionally interchangeable per ISO 15552. It shares the standard 40 mm mounting interface and G1/4 port, but note it uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
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