Airtac SAID40 Double Rod Cylinder SAID40X325
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X325 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 SAID40X325
The AirTAC SAID40X325 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 325mm stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528 N of force both ways at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
This through-rod architecture allows you to mount a workpiece on the front rod end while utilizing the rear protrusion for a cam, position flag, or secondary mechanism. It shares the exact ISO 15552 mounting interface of the single-rod SAI but omits FB, CA, CB, and CR brackets, offering a refined set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 accessories.
Airtac SAID40 Double Rod Cylinder SAID40X325 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X325 |
|---|---|
| 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 SAID40X325
| 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 SAID40X325 Is Used
Symmetric Force Transfer
Provides identical 528 N thrust on extend and retract strokes for machinery requiring perfectly balanced push-pull dynamics without pressure compensation.
Anti-Rotation Slides
The twin-rod design resists torsional twist, keeping linear guided presses and lifting stations perfectly aligned throughout the 325mm travel.
Rear-Cam Actuation
The protruding rear rod end drives a secondary cam or mechanical flag, allowing one cylinder to trigger external limit switches while performing primary work.
Is the Airtac SAID40 Double Rod Cylinder SAID40X325 the Right Cylinder?
Choose this 40mm bore double-rod cylinder when your application demands equal push and pull forces, or requires dual-side guidance to prevent rotation. It delivers 528 N both directions at 0.5 MPa; step down to a 32mm bore for lighter loads (345 N) or up to a 50mm bore (825 N) if you need more thrust. The PT tapered port thread ensures a tight, leak-free pneumatic connection.
At 325mm of travel, the unsupported stroke length increases the risk of rod-bearing bending under heavy lateral loads, so utilizing an external guide is highly recommended. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; if your system loses air pressure, this cylinder will drift and cannot hold a load—consider a SAIL or BSAID for positive locking.
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 SAID40X325 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the force is 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.
Yes, it is dimensionally interchangeable per ISO 15552 profile cylinder standards. It supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It does not use the FB, CA, CB, or CR brackets found on single-rod variants.
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