Airtac SAID40 Double Rod Cylinder SAID40X350S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X350S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X350S
The AirTAC SAID40X350-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 350mm stroke. Because the twin rods occupy both sides of the piston, the annulus area is identical in each direction, yielding an equal extend and retract force of 528 N at 0.5 MPa. The integrated -S magnet enables position detection via CMSE reed or DMSE electronic switches seated in the dual sensor grooves.
This configuration uses standard carbon steel rods and PT tapered ports. A rod extends from both end covers, allowing you to drive a primary workpiece on one end while mounting a cam, position flag, or secondary mechanism on the rear. This symmetric through-rod layout also provides superior anti-rotation guidance compared to a single-rod SAI.
Airtac SAID40 Double Rod Cylinder SAID40X350S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X350S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAID40X350S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAID40X350S Is Used
Symmetric Transfer
Drives a transfer carriage with identical push and pull thrust, ensuring consistent acceleration and deceleration profiles across the 350mm stroke.
Dual-Station Actuation
Simultaneously operates two separate mechanisms from a single piston, using the front rod for the primary task and the rear rod for secondary timing.
Anti-Rotation Slide
Leverages the twin through-rods to guide a vertical slide, preventing torsional twist without requiring external linear bearings.
Is the Airtac SAID40 Double Rod Cylinder SAID40X350S the Right Cylinder?
Select this 40mm bore when an application demands matched bidirectional force and dual-side actuation, stepping up from a 32mm bore (345 N at 0.5 MPa) or down from a 50mm bore (825 N). The double-rod design is chosen over a single-rod SAI when the mechanism requires rear-rod sensing, twin-station driving, or enhanced load stability against rotation. For drop-in replacements, verify the 40mm bore, 350mm stroke, PT port threads, and appropriate mounting accessory.
At 350mm of travel, the unsupported stroke length increases rod-bearing bending stress under side loads; utilizing an external guide rail is recommended to prevent premature wear. Note that the adjustable air cushions only decelerate the piston near stroke ends and do not hold the load. If static position holding is required without live air pressure, consider a SAIL lock cylinder, a BSAID clamp-lock, or an external pilot-operated check valve.
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 SAID40X350S FAQ
Because the double-rod design equalizes the piston area on both sides, the output force is identical in both directions: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X350-S is dimensionally interchangeable per ISO 15552. It shares the standard mounting footprint and accepts Basic, FA, LB, TC, FTC, TCM1, and TCM2 accessories, though it omits FB, CA, CB, and CR mounts.
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