Airtac SAID40 Double Rod Cylinder SAID40BX240
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX240 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAID40 Double Rod Cylinder SAID40BX240
The AirTAC SAID40X240 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 240mm stroke. Because a stainless SUS304 rod exits both end covers, the annulus area is identical on extend and retract. This yields exactly 528N of force each way at 0.5 MPa, ensuring perfectly symmetric speed and thrust for demanding transfer operations.
Beyond balanced kinetics, the twin-rod architecture allows you to mount a workpiece on the front rod end and a position flag, cam, or secondary tool on the rear. The extruded aluminum barrel includes sensor grooves on both sides for flexible CMSE reed or DMSE solid-state switch placement. PT tapered ports ensure a tight, leak-free pneumatic connection.
Airtac SAID40 Double Rod Cylinder SAID40BX240 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX240 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 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 SAID40BX240
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×240 | 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 SAID40BX240 Is Used
Symmetric Transfer
Drives parts across a conveyor with identical force and speed in both directions, preventing jerk or acceleration mismatches during push-and-pull cycles.
Anti-Rotation Slide
The twin-rod design naturally resists torsional twist, keeping guided slides perfectly aligned without needing external linear bearings.
Rear-Cam Actuation
Mounts the primary workpiece on the front rod while utilizing the rear rod end to trigger a mechanical limit cam or secondary mechanism simultaneously.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX240 the Right Cylinder?
Select this 40mm bore when an application strictly requires equal push and pull forces—such as 528N at 0.5 MPa or 739N at 0.7 MPa—since standard single-rod SAI cylinders inherently generate unequal thrust. If your mechanism needs less force, the 32mm bore provides 345N both ways; if more is required, step up to the 50mm bore for 825N. The 240mm stroke falls comfortably within the 1200mm standard limit, but at this length the unsupported load can induce rod-bearing bending; always use an external guide for heavy payloads.
Choose the double-rod configuration over a single-rod SAI when you need built-in anti-rotation guidance or dual-side actuation. Note that a plain SAID40X240 does NOT hold its load if air pressure drops or the valve is centered—the piston will drift. For fail-safe position holding without live pressure, specify an external pilot-operated check valve, a SAIL lock variant, or a BSAID clamp-lock cylinder. This model is dimensionally interchangeable per ISO 15552 for drop-in replacement tasks.
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 SAID40BX240 FAQ
Because the rod occupies both sides of the piston, the effective area is equal in both directions. The SAID40X240 generates 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa on both extend and retract strokes.
Yes, it is dimensionally interchangeable per ISO 15552. However, the SAID series uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits FB, CA, CB, and CR brackets found on single-rod variants.
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