Airtac SAID40 Double Rod Cylinder SAID40AX550
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX550 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 SAID40AX550
The AirTAC SAID40X550 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 550mm stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding equal force and speed in both directions. This design provides 528N of thrust and pull at 0.5 MPa, scaling to 739N at 0.7 MPa.
This specific configuration uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance over standard carbon steel. The barrel integrates sensor grooves on both sides for CMSE reed or DMSE solid-state switches, though this unit ships without a magnet. The rear rod protrusion allows engineers to mount a position flag or secondary cam while driving the primary load on the front side.
Airtac SAID40 Double Rod Cylinder SAID40AX550 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX550 |
|---|---|
| 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 SAID40AX550
| 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 SAID40AX550 Is Used
Symmetric Force Transfer
Drives a transfer carriage with identical 528N push and pull force at 0.5 MPa, ensuring consistent acceleration and deceleration regardless of travel direction.
Anti-Rotation Slides
Twin rods exiting both ends keep the workpiece guided against rotation, replacing bulky external linear guides in compact vertical slide assemblies.
Dual-Side Actuation
Mounts the primary work tool on the front rod end and a mechanical cam or position flag on the rear rod end to trigger external sequence valves.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX550 the Right Cylinder?
Select this 40mm bore when an application strictly demands symmetric force, requiring exactly 528N in both travel directions at 0.5 MPa. If your mechanism needs less force, step down to the 32mm bore (345N both ways); for heavier transfer loads, step up to the 50mm bore (825N). Unlike a single-rod SAI, the SAID twin-rod design naturally resists torsional rotation, guiding the load on dual sides.
This 550mm stroke requires careful installation planning, as the overall length is significantly extended by the rear rod protruding both ends. For strokes of this length, the 16mm rod and M12x1.25 thread face increased rod-bearing bending moments under side loads, so an external guide rail is strongly recommended. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; they do not hold the load if air pressure drops. For position holding without live pressure, consider an external pilot-operated check valve or the BSAID clamp-lock variant. This cylinder uses a PT tapered port thread and is dimensionally interchangeable per ISO 15552. Available mountings include Basic, FA, LB, TC, FTC, TCM1, and 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 SAID40AX550 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the force is equal in both directions. It generates 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extend and retract strokes.
Yes, the SAID40X550 is a profile cylinder dimensionally interchangeable per ISO 15552. It serves as a drop-in replacement for other ISO 15552 double-rod cylinders, utilizing a PT G1/4 port and standard mounting interfaces like FA, LB, and TC.
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