Airtac SAID40 Double Rod Cylinder SAID40X25S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X25S 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAID40 Double Rod Cylinder SAID40X25S
The AirTAC SAID40X25-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 25mm stroke. Because the piston rod exits both end covers, the effective annulus area is identical in both directions, yielding an equal push and pull force of 528 N at 0.5 MPa. The integrated magnet (-S) enables position detection using AirTAC CMSE reed or DMSE electronic solid-state switches mounted in the dual-side sensor grooves.
This unit uses a standard carbon steel rod and PT tapered port threads. The through-rod design allows you to attach a primary workpiece on one end and a mechanical cam or position flag on the rear rod end. It shares the exact ISO 15552 mounting interface of the single-rod SAI series, but utilizes a reduced accessory set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAID40 Double Rod Cylinder SAID40X25S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X25S |
|---|---|
| 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 SAID40X25S
| 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 SAID40X25S Is Used
Symmetric-Force Transfer
Drives a shuttle mechanism where the equal 528 N extend and retract forces ensure consistent timing and momentum on both strokes.
Anti-Rotation Slides
The twin-rod geometry guides the load against twisting, maintaining precise alignment for short-stroke pressing or gauging tasks.
Through-Rod Sensing
Mounts the work tool on the front rod while using the rear rod extension to physically trigger an external limit flag or sensor.
Is the Airtac SAID40 Double Rod Cylinder SAID40X25S the Right Cylinder?
Select this 40mm bore when an application requires 528 N of symmetric force in both directions, stepping up from the 32mm bore (345 N) if you need extra thrust, or down from the 50mm bore (825 N) to save space. The twin-rod architecture is chosen over a single-rod SAI when the load requires superior anti-rotation guidance or when a rear-rod extension is needed to trip a limit sensor. For dimensionally interchangeable drop-in replacements, match the 40mm bore, 25mm stroke, PT port thread, and mounting accessory.
Note that a plain double-rod cylinder does not hold its position if air pressure is lost; the piston will drift. The adjustable air cushions at both ends only decelerate the piston near stroke end and do not function as a locking brake. If pneumatic fail-safe holding is required, consider the SAIL or BSAID clamp-lock 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 SAID40X25S FAQ
Because it is a double-rod cylinder, the rod occupies both sides of the piston, making the force equal in both directions. It provides 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extend and retract strokes.
Yes, the SAID40X25-S is dimensionally interchangeable per ISO 15552 mounting dimensions. You can use it as a drop-in replacement for other ISO 15552 profile cylinders, matching the 40mm bore, 25mm stroke, and PT port threads.
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