Airtac SAID40 Double Rod Cylinder SAID40BX400S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX400S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX400S
The AirTAC SAID40X400-S is a double-acting, double-rod ISO 15552 profile cylinder. A single piston drives a rod out of both end covers, yielding perfectly symmetric dynamics. Because the annulus area is identical on each side, it generates 528 N of force in both extend and retract directions at 0.5 MPa. The -S suffix indicates an integrated magnet compatible with AirTAC CMSE reed and DMSE solid-state sensors.
This variant uses SUS304 stainless steel rods (material code B) for superior corrosion resistance. The G1/4 PT tapered ports ensure a tight pneumatic seal. The extruded aluminum barrel features sensor grooves on both sides, and the rear rod extension allows you to mount a secondary cam, position flag, or second tooling head.
Airtac SAID40 Double Rod Cylinder SAID40BX400S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX400S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAID40BX400S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SAID40BX400S Is Used
Symmetric Force Transfer
Drives a transfer carriage with exactly 528N of thrust in both directions, ensuring consistent timing on push and pull strokes without pressure compensation.
Anti-Rotation Slides
The twin SUS304 rods prevent the piston plate from twisting under offset loads, keeping linear slides perfectly aligned over the 400mm travel.
Rear-End Sensing
Uses the -S magnet with DMSE electronic sensors on the dual side grooves, while the rear rod protrusion can simultaneously drive an external limit flag.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX400S the Right Cylinder?
Choose this 40mm bore when an application requires equal push and pull thrust (528 N at 0.5 MPa) along with anti-rotation stability. If your mechanism needs less force, the 32mm bore offers 345 N; if you need more thrust, the 50mm bore provides 825 N. The double-rod design inherently resists torsional load better than a single-rod SAI, keeping the workpiece guided.
At 400mm stroke, the unsupported rod length increases bending risk on the rod bearing; an external guide rail is recommended to handle side loads. Remember that the adjustable air cushions at both ends only decelerate the piston near stroke end and do not hold the load. If position holding without air pressure is required, use a SAIL lock cylinder, a BSAID clamp-lock, or an external pilot-operated check valve. This unit is dimensionally interchangeable per ISO 15552 and uses the reduced SAID mounting set: Basic, FA, LB, TC, FTC, TCM1, TCM2.
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 SAID40BX400S FAQ
Because the rod occupies both sides of the piston, the effective area is equal in both directions. It provides 528 N of force at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extend and retract strokes.
Yes, it is a profile cylinder dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders. It uses the standard SAID mounting accessory set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and PT threaded G1/4 ports.
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