Airtac SAID40 Double Rod Cylinder SAID40AX55
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX55 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX55
The AirTAC SAID40X55 is a double-acting, double-rod ISO 15552 profile cylinder engineered for applications requiring equal force and speed in both directions. Because the piston rod extends from both end covers, the effective annulus area is identical on extend and retract, yielding a symmetrical thrust of 528 N each way at 0.5 MPa. The 55 mm stroke operates at speeds of 30-800 mm/s.
This specific configuration features a SUS420J2 stainless steel rod for enhanced durability against moisture and minor corrosion. It uses PT tapered port threads (G1/4) and lacks a piston magnet. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount position switches independently if external magnets or flags are added to the rear rod.
Airtac SAID40 Double Rod Cylinder SAID40AX55 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX55 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAID40AX55
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SAID40AX55 Is Used
Symmetric Transfer
Drives a workpiece forward and retracts it backward with identical 528 N force, ensuring perfectly balanced symmetric transfer between two stations.
Anti-Rotation Slide
Uses the twin-rod geometry to guide vertical slides and prevent mechanical twisting, eliminating the need for external guide rails in compact spaces.
Rear-Rod Cam Actuation
Mounts the primary tool on the front rod while utilizing the rear rod protrusion to physically trip a limit switch or operate a secondary mechanism.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX55 the Right Cylinder?
Select this 40 mm bore when a project demands anti-rotation guidance or dual-side actuation that a single-rod SAI cannot provide. If your mechanism requires less thrust, stepping down to the 32 mm bore offers 345 N both ways at 0.5 MPa; stepping up to the 50 mm bore provides 825 N. The SAID40X55 is dimensionally interchangeable per ISO 15552, making it a drop-in replacement for other ISO 15552 double-rod cylinders.
When ordering, confirm the 55 mm stroke, G1/4 PT ports, SUS420J2 rod material, and the absence of a magnet. Note that a plain SAID does not hold its position if air pressure is lost; the piston will drift. For load-holding safety without live pressure, consider an external pilot-operated check valve or the related BSAID clamp-lock series. Mounting options are limited to 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 SAID40AX55 FAQ
Because it is a double-rod cylinder, the effective piston area is identical on both sides. It provides an equal push and pull force of 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
No, the SAID series uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Mounts like FB, CA, CB, and CR are strictly for single-rod SAI cylinders and are incompatible with the rear rod.
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