Airtac SAID40 Double Rod Cylinder SAID40BX325
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX325 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 SAID40BX325
The AirTAC SAID40X325 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40 mm bore and 325 mm stroke. A single piston drives a rod out of both end covers, meaning the annulus area is identical on extend and retract. Consequently, it generates an equal 528 N of force in both directions at 0.5 MPa (739 N at 0.7 MPa).
This specific configuration features SUS304 stainless steel rods (material code B) for superior corrosion resistance in harsh environments. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE solid-state switches. Because the rear rod protrudes from the back cover, you must account for additional rear clearance in your layout.
Airtac SAID40 Double Rod Cylinder SAID40BX325 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX325 |
|---|---|
| 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 SAID40BX325
| 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 SAID40BX325 Is Used
Symmetric Force Transfer
Provides exactly 528 N of push and pull force at 0.5 MPa, ideal for presses or clamps requiring identical force and speed in both directions.
Anti-Rotation Slides
The twin SUS304 rods keep the workpiece guided against rotation better than a single rod, ensuring precise linear movement over the 325 mm stroke.
Through-Rod Sensing
Mount the workpiece on the front rod end and a cam or position flag on the rear rod end to trigger external sensors without interfering with the primary load.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX325 the Right Cylinder?
Choose this 40 mm bore double-rod actuator over a single-rod SAI when your mechanism requires anti-rotation guidance, dual-side actuation, or a rear-mounted position flag. If your application needs less force, the 32 mm bore offers 345 N both ways at 0.5 MPa; if you need more, the 50 mm bore provides 825 N. This unit uses a PT tapered G1/4 port and M12x1.25 rod threads.
At 325 mm of stroke, the unsupported rod length increases the risk of rod-bearing bending under side loads; use an external guide rail to prevent premature wear. Note that a plain SAID does not hold its position if air pressure is lost or exhausted—the piston will drift. For load-holding without live pressure, consider an external rod lock or the SAIL/BSAID locking cylinder variants. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAID40BX325 FAQ
Because the rod area is subtracted on both sides, the SAID40X325 generates equal force in both directions: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X325 is dimensionally interchangeable per ISO 15552 and serves as a drop-in replacement for other ISO 15552 double-rod profile cylinders, using a PT G1/4 port and M12x1.25 rod threads.
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