Airtac SAID40 Double Rod Cylinder SAID40X550S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X550S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 550mm 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
- Stroke550 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X550S
The AirTAC SAID40X550-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a carbon steel rod that exits both end covers. Because the twin rods occupy equal area on both sides, the annulus area is identical in extend and retract, yielding a perfectly symmetrical 528 N of force each way at 0.5 MPa. The included -S magnet enables position sensing along the dual-side barrel grooves using AirTAC CMSE reed or DMSE electronic switches.
A rear rod protrusion allows engineers to mount a secondary cam, position flag, or separate mechanism opposite the primary workpiece. This twin-rod layout inherently resists piston rotation better than a single-rod unit. It uses adjustable air cushions at both ends (30 mm cushion length) to decelerate the load, and operates efficiently at speeds between 30 and 800 mm/s.
Airtac SAID40 Double Rod Cylinder SAID40X550S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X550S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 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 SAID40X550S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×550 | 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 SAID40X550S Is Used
Symmetric Transfer
Transfers workpieces with identical 528 N push and pull forces, ensuring perfectly balanced motion control for automated assembly lines.
Dual-Station Actuation
Drives two separate mechanisms simultaneously by mounting a primary tool on the front rod end and a secondary cam on the rear protrusion.
Anti-Rotation Slides
Keeps heavy sliding loads guided and prevented from twisting during long 550 mm traverses, thanks to the inherent stability of the twin-rod layout.
Is the Airtac SAID40 Double Rod Cylinder SAID40X550S the Right Cylinder?
Choose this 40 mm bore when an application demands equal push and pull forces alongside anti-rotation guidance, rather than the uneven output of a single-rod SAI. If your mechanism requires less force, step down to the 32 mm bore (345 N both ways); if you need more thrust, the 50 mm bore provides 825 N each way at 0.5 MPa. This cylinder uses a PT G1/4 port and accepts the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR accessories.
At 550 mm of stroke, the 16 mm rod and M12x1.25 thread endure increased bending moments, so adding an external guide is recommended to prevent rod-bearing side-load wear. Note that the air cushion only decelerates the piston near stroke end; it does not hold the load. If the air supply drops, the piston drifts. For dead-load holding, specify a SAIL, BSAID, or an external pilot-operated check valve. This model is dimensionally interchangeable per ISO 15552 for drop-in replacement of other standard double-rod cylinders.
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 SAID40X550S FAQ
It delivers 528 N of force in both the extend and retract directions at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The double-rod design ensures push and pull forces are equal.
Yes, the SAID40X550-S is dimensionally interchangeable per ISO 15552. It serves as a direct drop-in replacement for other ISO 15552 double-rod profile cylinders, using a PT G1/4 port and standard mounting accessories.
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