Airtac SAID40 Double Rod Cylinder SAID40BX125S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX125S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX125S
The AirTAC SAID40X125-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 125mm stroke. Because a rod extends from both end covers, the annulus area is identical on both sides, yielding exactly 528 N of force in both extend and retract directions at 0.5 MPa. This symmetric output is ideal for mechanisms requiring equal push and pull dynamics.
Equipped with a magnet for position sensing, this variant works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side barrel grooves. The rods are constructed from SUS304 stainless steel for superior corrosion resistance, and the PT tapered port threads ensure a robust, leak-free pneumatic connection.
Airtac SAID40 Double Rod Cylinder SAID40BX125S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX125S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 SAID40BX125S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 SAID40BX125S Is Used
Symmetric Force Transfer
Drives a transfer carriage with identical 528 N push and pull thrust at 0.5 MPa, ensuring consistent momentum and cycle times in both motion directions.
Anti-Rotation Slides
The twin SUS304 rods provide dual-side guidance, preventing the load from twisting during vertical or horizontal positioning without external guides.
Dual-Side Actuation
Mounts the primary work tool on the front rod extension and a secondary cam or position flag on the rear rod to trigger CMSE/DMSE sensors sequentially.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX125S the Right Cylinder?
Select this 40mm bore double-rod cylinder when an application demands equal force both ways (528 N at 0.5 MPa) and anti-rotation stability that a single-rod SAI cannot provide. If your mechanism requires less force, stepping down to the 32mm bore yields 345 N; if you need more thrust, the 50mm bore provides 825 N. The through-rod design allows mounting a workpiece on the front and a cam or position flag on the rear rod simultaneously.
As a dimensionally interchangeable ISO 15552 cylinder, it serves as a drop-in replacement for other ISO 15552 double-rod cylinders. Specify the PT port, your mounting accessory (choose from Basic, FA, LB, TC, FTC, TCM1, or TCM2), and the -S magnet. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold the load. If air pressure is lost, the piston will drift unless an external rod lock or pilot-operated check valve is used.
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 SAID40BX125S 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, the SAID40X125-S is an extruded aluminum profile cylinder that is dimensionally interchangeable per ISO 15552 standards, allowing it to serve as a drop-in replacement for other ISO 15552 double-rod cylinders with matching mounting dimensions.
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