Airtac SAID40 Double Rod Cylinder SAID40AX400S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX400S 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 SAID40AX400S
The AirTAC SAID40X400-S is a double-acting, double-rod ISO 15552 profile cylinder. Because a rod exits both ends, the annulus area is identical on extend and retract, yielding an equal 528 N of force in each direction at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet enables tracking with AirTAC CMSE reed and DMSE electronic switches.
This 40 mm bore unit features a 16 mm SUS420J2 stainless steel rod (material code A) and PT tapered port threads. The through-rod design is ideal for mounting a primary workpiece on one end and a cam or position flag on the opposite end, providing dual-side guidance and superior anti-rotation resistance compared to a single-rod SAI.
Airtac SAID40 Double Rod Cylinder SAID40AX400S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX400S |
|---|---|
| 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 SAID40AX400S
| 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 SAID40AX400S Is Used
Symmetric Force Transfer
Drives a dual-station actuation system where the equal 528 N push and pull forces are critical for maintaining balanced timing on both strokes.
Anti-Rotation Slides
The twin-rod architecture prevents the piston from twisting during long 400 mm traverses, keeping the mounted tooling perfectly aligned without external guides.
Through-Rod Sensing
Mounts the primary workpiece on the front rod while using the rear rod end to trigger CMSE or DMSE sensors via the built-in magnet for dual-side control.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX400S the Right Cylinder?
Select this 40 mm bore when an application requires perfectly symmetric force and speed, as the twin rods ensure extend and retract forces match exactly at 528 N (0.5 MPa). If your mechanism needs less force, the 32 mm bore offers 345 N both ways; if you need more push or pull, step up to the 50 mm bore for 825 N. Choose the double-rod SAID over a single-rod SAI when you need to drive a secondary mechanism from the rear or require precise anti-rotation guidance.
Because the stroke is 400 mm, the unsupported rod length increases the risk of rod-bearing bending under side loads; use an external guide rail to support the load. The mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting the FB, CA, CB, and CR variants used on single-rod cylinders). Note that the adjustable air cushions at both ends only decelerate the piston near stroke end and do not hold the load if air pressure is lost.
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 SAID40AX400S FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the output force is equal in both directions. It provides 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X400-S is dimensionally interchangeable per ISO 15552 standards. It serves as a direct drop-in replacement for other ISO 15552 double-rod profile cylinders, utilizing PT tapered ports and standard mounting dimensions.
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