Airtac SAID40 Double Rod Cylinder SAID40BX185
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX185 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX185
The AirTAC SAID40X185 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40 mm bore and 185 mm stroke. Because a SUS304 stainless steel rod exits both end covers, the effective piston area is identical on extend and retract. This yields an equal 528 N of force in both directions at 0.5 MPa, preventing speed discrepancies between strokes.
Beyond balanced thrust, the twin-rod architecture allows mounting a primary workpiece on the front while attaching a cam or position flag to the rear rod for dual-side sensing. The extruded aluminum barrel includes sensor grooves on both sides, and the unit operates at 30-800 mm/s with adjustable air cushions at both ends.
Airtac SAID40 Double Rod Cylinder SAID40BX185 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX185 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 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 SAID40BX185
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×185 | 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 SAID40BX185 Is Used
Symmetric Transfer
Drives a transfer carriage with identical 528 N force and speed in both directions, ensuring precise cycle timing without asymmetric acceleration.
Anti-Rotation Slide
The dual SUS304 rods provide torsional rigidity, preventing piston yaw and keeping guided linear slides perfectly aligned under offset loads.
Dual-Station Actuation
Mount a primary tool on the front rod and a secondary cam or limit flag on the rear protrusion to trigger external sensors at mid-stroke.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX185 the Right Cylinder?
Choose this 40 mm bore double-rod actuator when an application strictly demands equal push and pull forces alongside anti-rotation guidance. If your mechanism requires less thrust, stepping down to the 32 mm bore yields 345 N each way, whereas the 50 mm bore provides a higher 825 N both-direction force at 0.5 MPa. The PT tapered port threads ensure a robust, leak-free pneumatic connection.
This SAID model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets. Note that the adjustable air cushion only decelerates the piston near stroke end; it does not hold a load. If your system loses air pressure, the piston will drift unless paired with an external rod lock or a SAIL/BSAID locking cylinder.
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 SAID40BX185 FAQ
Because the double-rod design occupies area on both sides of the piston, the push and pull forces are equal. It delivers 528 N in both directions at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes. The SAID40X185 is a true ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 double-rod cylinders. It uses PT ports and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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