Airtac SAID40 Double Rod Cylinder SAID40X400S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X400S 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 SAID40X400S
The AirTAC SAID40X400-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 16mm carbon steel rod exiting both end covers. Because the piston sees an equal annulus area on both sides, it generates an identical 528N of thrust and retraction force at 0.5MPa. The integrated -S magnet enables position detection via AirTAC CMSE reed and DMSE electronic sensors housed in the dual-side barrel grooves.
Having a rod protrude from the rear cover allows engineers to mount a cam, position flag, or secondary mechanism opposite the primary workpiece. This twin-rod layout provides superior anti-rotation guidance compared to a single-rod SAI, while the extruded aluminum barrel maintains a true ISO 15552 mounting interface.
Airtac SAID40 Double Rod Cylinder SAID40X400S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X400S |
|---|---|
| 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 SAID40X400S
| 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 SAID40X400S Is Used
Symmetric Force Transfer
Ideal for pushing and pulling loads where equal 528N force and speed in both directions ensures smooth, balanced material handling without momentum shifts.
Anti-Rotation Slides
The twin 16mm carbon steel rods prevent the load from twisting during traverse, providing precise linear guidance for sliding gates or indexing fixtures.
Rear-Mounted Sensing
The -S magnet works with CMSE and DMSE switches, allowing a rear-position flag to trigger secondary operations while the front rod drives the primary tool.
Is the Airtac SAID40 Double Rod Cylinder SAID40X400S the Right Cylinder?
Choose this 40mm bore over the smaller 32mm variant (345N both ways at 0.5MPa) when your application demands higher symmetric thrust, or step up to the 50mm bore (825N) for heavier transfer duties. The double-rod architecture is selected over a single-rod cylinder when dual-side guidance, anti-rotation control, or rear-rod actuation is required. It uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR accessories.
With a 400mm stroke, the unsupported piston rod bearing faces increased bending moments under side-loads; utilizing an external guide rail is highly recommended to prevent premature wear. Note that the adjustable air cushions only decelerate the piston near stroke end and do not hold the load if air pressure is lost. For position holding without live pressure, consider an external rod lock, a SAIL cylinder, or the BSAID clamp-lock variant. This model features PT tapered port threads.
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 SAID40X400S FAQ
Because it is a double-rod cylinder, the effective piston area is identical on both sides. It delivers 528N of force in both extend and retract directions at 0.5MPa, and 739N at 0.7MPa.
Yes, the SAID40X400-S is dimensionally interchangeable per ISO 15552 standards. It serves as a drop-in replacement for other ISO 15552 double-rod profile cylinders, provided you use the SAID mounting accessory set.
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