Airtac SAID40 Double Rod Cylinder SAID40AX550S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX550S 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 SAID40AX550S
The AirTAC SAID40X550-S is a double-acting, double-rod ISO 15552 profile cylinder. A single piston drives a rod out of both end covers, yielding identical extend and retract forces. Because the annulus area is symmetrical, you get 528 N of thrust in each direction at 0.5 MPa (739 N at 0.7 MPa). The integrated magnet (-S) directly supports position sensing with AirTAC CMSE reed and DMSE solid-state switches.
This variant features a SUS420J2 stainless steel rod for superior corrosion resistance compared to standard carbon steel. The G1/4 port uses a PT tapered thread type. The extruded aluminum barrel includes sensor grooves on both sides, while adjustable air cushions at both ends absorb kinetic energy near stroke end.
Airtac SAID40 Double Rod Cylinder SAID40AX550S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX550S |
|---|---|
| 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 SAID40AX550S
| 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 SAID40AX550S Is Used
Symmetric Force Transfer
Provides equal push and pull thrust for material handling systems that must push and retract identical loads without adjusting pressure valves.
Twin-Station Actuation
Uses the front rod to drive a primary workpiece while the rear rod simultaneously operates a secondary mechanism or ejector on the opposite side.
Anti-Rotation Slides
The dual through-rod geometry prevents piston rotation, keeping guided lifts and vertical slides perfectly aligned without external torsion.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX550S the Right Cylinder?
Choose this 40 mm bore when you need balanced 528 N force both ways and a rear rod for mounting a cam or limit flag. If your application requires less thrust, the 32 mm bore offers 345 N; if you need more power, the 50 mm bore provides 825 N. The twin-rod design inherently resists torsional rotation better than a single-rod SAI, making it ideal for guided lifts and twin-station actuation.
At 550 mm stroke, the unsupported rod length increases bending moments on the rod bearing; use an external guide rail to handle side loads. Remember that the adjustable air cushion only decelerates the piston—it does not hold a load. If air pressure drops, the cylinder drifts; for fail-safe holding, specify a SAIL lock or BSAID clamp-lock. This model is dimensionally interchangeable per ISO 15552.
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 SAID40AX550S FAQ
Because the rod occupies both sides of the piston, the effective area is identical in both directions. It delivers 528 N of force at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa on both extend and retract strokes.
Yes. The SAID40X550-S is an ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 double-rod cylinders. It uses a G1/4 port and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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