Airtac SAID40 Double Rod Cylinder SAID40BX250
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX250 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX250
The AirTAC SAID40X250 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 250mm stroke. Because a stainless SUS304 rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528N of force in each direction at 0.5 MPa. This twin-rod architecture is ideal for mounting a primary workpiece on one end and a cam or position flag on the rear rod.
The extruded aluminum barrel includes sensor grooves on both sides for flexible detection placement. It features adjustable air cushions at both ends (30mm cushion length) to decelerate the piston near stroke limits. The PT tapered port threads and robust SUS304 stainless steel rod provide excellent durability and corrosion resistance for demanding industrial environments.
Airtac SAID40 Double Rod Cylinder SAID40BX250 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX250 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAID40BX250
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SAID40BX250 Is Used
Symmetric Force Transfer
Drives a transfer arm with exactly 528N of force in both extend and retract directions, ensuring consistent timing and smooth motion without pressure imbalance.
Twin-Station Actuation
Actuates a secondary mechanism via the rear rod end while the primary stroke drives the main tooling, maximizing machine layout density.
Anti-Rotation Slides
Keeps a guided load perfectly aligned against rotational torque using dual-side rod support, preventing binding over the 250mm travel.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX250 the Right Cylinder?
Select this 40mm bore double-rod cylinder when your application requires equal push and pull forces (528N at 0.5 MPa) and superior anti-rotation guidance compared to a single-rod SAI. If you need higher thrust, stepping up to the 50mm bore yields 825N both ways at 0.5 MPa. The SAID mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles found on single-rod variants.
Because the 250mm stroke is substantial, the unsupported rod bearing experiences more bending moment under side loads; for optimal seal life, use an external guide rail to prevent rod deflection. Note that a plain SAID does not hold position or lock a load when air pressure is lost or the valve is centered—the piston will drift. For load-holding requirements, consider the SAIL (air-released lock) or BSAID (clamp-lock) series instead. This model is dimensionally interchangeable per ISO 15552 as a drop-in replacement for other double-rod profile cylinders.
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 SAID40BX250 FAQ
Because it is a double-rod cylinder, the effective piston area is the same on both sides. It delivers an equal 528N of force in both directions at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa.
Yes, the SAID40X250 is dimensionally interchangeable per ISO 15552. It shares the exact mounting footprint of standard profile cylinders, though it uses a reduced mounting accessory set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR mounts.
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