Airtac SDAD Double Rod Slim Cylinder SDAD50X20S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X20S is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø50mm bore, 20mm stroke). The through-rod resists twisting and lets you drive a tool on one end while a switch or dog reads position on the other — with identical force in both directions.
- BoreØ50 mm
- Stroke20 mm
- Port sizePT1/4
- Acting typeDouble acting, double rod
- Rod threadM10×1.5 (F) / M18×1.5 (B)
- CushionFixed NBR bumper (both ends)
About the Airtac SDAD Double Rod Slim Cylinder SDAD50X20S
The AirTAC SDAD50X20S is a double-acting compact cylinder featuring a through-rod that exits both ends of the riveted body. Because the piston rod occupies both chambers, the annular area is identical on extend and retract, yielding exactly 824.7 N of force at 0.5 MPa in each direction. This symmetry prevents twisting during transit and allows you to drive a tool on one end while mounting a dog or switch on the opposite end.
The 50 mm bore uses a 20 mm rod and a PT1/4 port, operating at 30-500 mm/s within a -20 to +70 C environment. This specific configuration includes the S option, providing a built-in piston magnet for direct compatibility with AirTAC reed or electronic switches along the body grooves. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs shock but is not an adjustable air cushion.
Airtac SDAD Double Rod Slim Cylinder SDAD50X20S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X20S |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Double acting, rod both ends |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 male (B) |
| 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 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 120 mm |
Because a rod occupies both cylinder chambers, the effective area — and therefore the force — is identical in both directions. Specifications follow the official AirTAC SDAD datasheet.
Theoretical Output Force (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa | 1155 N |
| Max (@1.0 MPa) | 168 kgf |
Force uses the annular (rod-side) area on both strokes, so extend and retract match. Actual usable force is lower than theoretical due to friction. Size with a safety margin.
Model Code: Airtac SDAD Double Rod Slim Cylinder SDAD50X20S
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 50 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rods (omit = female thread). |
Thread: PT standard. Related SDA-family variants: SDA (single rod), SSA/STA (single acting), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Where the Airtac SDAD Double Rod Slim Cylinder SDAD50X20S Is Used
Symmetric Lift Stations
Drives a guided vertical lift platform where the equal 824.7 N push and pull force prevents sagging on the return stroke.
Dual-End Transfer Arms
Mounts a grip tool on the front rod and a position dog on the rear rod, using the built-in magnet to trigger an electronic switch for handoff timing.
Compact Sealing Press
Fits into a shallow machine frame to apply steady 0.5 MPa clamping force on carton flaps without twisting the fixture.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X20S the Right Cylinder?
When sizing this model against its neighbors, the SDAD40 provides 527.8 N at 0.5 MPa, while the larger SDAD63 offers 1401.5 N at 0.5 MPa. The SDAD50X20S sits comfortably in the middle, delivering 824.7 N at 0.5 MPa. Based on this figure, a safe working load is approximately 495 N (about 60 percent of capacity), translating to a vertical lift capability of roughly 42 kg with a 2:1 safety margin. The 20 mm stroke is well within the 130 mm maximum standard stroke for this bore.
The dual-end through-rod geometry provides inherent anti-rotation resistance, making it ideal for guided lifts. Remember that a plain cylinder does not hold position if air pressure drops or the valve is centered; the piston will drift, and the fixed NBR bumper only decelerates near the stroke end. For load holding without live pressure, install an external rod lock or a pilot-operated check valve. This unit is configured with the S magnet for sensing and female M10x1.5 rod-end threads on both ends.
Quick checklist
- ✓ Need equal force both directions?
- ✓ Anti-rotation / dual-end mounting?
- ✓ Space for a rod that exits both ends
- ✓ Port/thread type (PT)
- ✓ Magnet (S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Leave clearance for the rod exiting both ends.
- check Avoid side load on either rod end.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SDAD Double Rod Slim Cylinder SDAD50X20S FAQ
Because the rod exits both ends, push and pull forces are equal: 824.7 N at 0.5 MPa, 1154.5 N at 0.7 MPa, and a theoretical maximum of 168 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
No, a plain cylinder drifts when air is lost or the valve is centered, as the fixed NBR bumper only decelerates near the stroke end. To hold a vertical load, you must add an external rod lock or a pilot-operated check valve.
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