Airtac SAID40 Double Rod Cylinder SAID40BX120
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX120 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX120
The AirTAC SAID40X120 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 120mm stroke. Because the piston rod extends from both end covers, the effective annulus area is identical on extend and retract. This provides an equal 528N of force in both directions at 0.5 MPa, ensuring perfectly symmetric motion for your dual-side mechanisms.
This specific configuration utilizes a SUS304 stainless steel rod (option B) for superior corrosion resistance, paired with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount position switches along either rod extension. It offers adjustable air cushioning at both ends to decelerate the piston smoothly.
Airtac SAID40 Double Rod Cylinder SAID40BX120 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX120 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 120 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 SAID40BX120
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×120 | 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 SAID40BX120 Is Used
Symmetric Force Transfer
Drives a transfer carriage where the extend and retract forces must be identical, preventing jerky movements during direction changes.
Anti-Rotation Slides
The twin rods resist torsional twist, keeping a precision machining slide perfectly aligned without external linear bearings.
Rear-Rod Sensing
Mounts a cam or target on the protruding rear rod to trigger external sensors, keeping the primary work area clear of obstructions.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX120 the Right Cylinder?
Select this 40mm bore when an application requires balanced push and pull forces, which a standard single-rod SAI cannot provide. If your mechanism needs less force, the 32mm bore offers 345N both ways; if you need more, the 50mm bore provides 825N. The twin-rod design is ideal for anti-rotation guidance and mounting a secondary cam or position flag on the rear rod. Because the stroke is 120mm, side-load stress on the rod bearing is moderate, but external guides are recommended if carrying heavy off-center loads.
This cylinder is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders. To match your build, specify the 40mm bore, 120mm stroke, PT port thread, and your preferred mounting accessory from the SAID set (Basic, FA, LB, TC, FTC, TCM1, TCM2). 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, requiring an external pilot-operated check valve or a BSAID clamp-lock for true position holding.
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 SAID40BX120 FAQ
Because it is a double-rod cylinder, the force is equal in both directions. It delivers 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extend and retract strokes.
Yes, it is dimensionally interchangeable with ISO 15552 profile cylinders. It supports the SAID mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It does not use the FB, CA, CB, or CR mounts found on single-rod variants.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAID40 Double Rod Cylinder SAID40BX120
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.