Airtac SAID40 Double Rod Cylinder SAID40AX325
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX325 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX325
The AirTAC SAID40X325 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 325mm stroke. Because a rod extends from both end covers, the annular piston area is identical in both directions, yielding an equal extend and retract force of 528N at 0.5MPa. This symmetric thrust makes the unit ideal for synchronized dual-side actuation and maintaining balanced momentum.
Equipped with SUS420J2 stainless steel rods, this variant provides enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. It utilizes PT tapered port threads and adjustable air cushions at both ends to absorb impact energy near stroke limits.
Airtac SAID40 Double Rod Cylinder SAID40AX325 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX325 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 325 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 SAID40AX325
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×325 | 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 SAID40AX325 Is Used
Symmetric Transfer
Drives a transfer carriage with identical force and speed in both directions, ensuring stable cycling without momentum imbalances.
Anti-Rotation Slides
The twin-rod architecture prevents the piston from twisting under offset loads, guiding precision slides without external guide rails.
Dual-Tool Actuation
Mounts a primary workpiece on the front rod and a secondary cam or position flag on the rear rod to trigger external sensors.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX325 the Right Cylinder?
Choose this 40mm bore when an application demands equal push and pull forces of 528N at 0.5MPa, stepping up from the 32mm bore (345N) for higher workloads, or down from the 50mm bore (825N) for a lighter footprint. A double-rod design is selected over a single-rod SAI when the mechanism requires twin-station actuation, rear-end position sensing, or superior anti-rotation guidance for the load. For a drop-in replacement, ensure the ISO 15552 mounting dimensions, 325mm stroke, and PT porting match your existing fixture.
At 325mm, this stroke requires careful attention to side-load dynamics; long unsupported rod lengths increase bending stress on the rod bearing, so an external guide rail should be used to prevent premature wear. Note that the adjustable air cushions only decelerate the piston at end strokes and do not hold the load. If the assembly must maintain its position without live air pressure, consider a SAIL lock cylinder or an external rod lock.
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 SAID40AX325 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 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa in both directions.
Yes, the SAID40X325 is dimensionally interchangeable with other ISO 15552 profile cylinders. It uses the same mounting interface and PT G1/4 ports, allowing a seamless drop-in replacement for standard double-rod models.
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