Airtac SDAD Double Rod Slim Cylinder SDAD20X50S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X50S is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm bore, 50mm 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.
- BoreØ20 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDAD Double Rod Slim Cylinder SDAD20X50S
The AirTAC SDAD20X50S is a double-acting compact cylinder featuring an 8mm piston rod protruding from both ends of its riveted body. Because the rod occupies both chambers, the annular area is identical on extend and retract, yielding an equal push and pull force of 131.9 N at 0.5 MPa. This symmetry is highly advantageous for driving loads that must remain balanced in both directions.
The through-rod geometry inherently resists twisting, allowing you to mount a work tool on one end while fitting a dog or reed switch on the opposite end. The short body profile saves axial mounting depth where a larger cylinder will not fit. End-of-stroke deceleration is handled by a fixed NBR bumper, and the built-in magnet supports position sensing.
Airtac SDAD Double Rod Slim Cylinder SDAD20X50S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X50S |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 mm |
| Acting type | Double acting, rod both ends |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 90 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 (Ø20mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 132 N |
| 0.7 MPa | 185 N |
| Max (@1.0 MPa) | 27 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 SDAD20X50S
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 SDAD20X50S Is Used
Gripper Synchronization
Drives opposing gripper jaws via the dual-end rods, ensuring equal 131.9 N clamping force without rotational twist during part transfer.
Dual-Station Shuttle
Mounts a workpiece on one rod end and a position dog on the other, leveraging the 50mm stroke to transfer items between two parallel processing stations.
Balanced Pinning Press
Applies symmetric 184.7 N force at 0.7 MPa to insert pins evenly, using the anti-rotation through-rod to maintain precise perpendicular alignment.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X50S the Right Cylinder?
When sizing this unit, consider the adjacent bores: the SDAD16 provides 86.4 N at 0.5 MPa, while the SDAD25 offers 206.2 N at 0.5 MPa. For the SDAD20X50S, the 131.9 N output translates to a safe working load of roughly 79 N at a 60 percent margin, or a vertical lift capacity of approximately 6.7 kg with a 2:1 safety factor. The through-rod prevents rotation and enables dual-end mounting, but remember a plain cylinder drifts if air pressure is lost; use an external rod lock or pilot-operated check valve for strict load holding.
This specific configuration includes the S option for a built-in magnet compatible with AirTAC reed or electronic switches. The 50mm stroke is well within the 100mm standard maximum. It features an 8mm rod at both ends with female M4x0.7 rod-end threads, and the air port is M5x0.8. The fixed NBR bumper absorbs end shocks without offering adjustable cushioning.
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 SDAD20X50S FAQ
Because the double-rod design creates equal annular areas, the force is identical in both directions: 131.9 N at 0.5 MPa, 184.7 N at 0.7 MPa, and a theoretical maximum of 27 kgf at 1.0 MPa.
Yes, the 8mm through-rod exits both ends, allowing you to drive a tool on one side while mounting a dog for a reed or electronic switch on the opposite side. The S suffix ensures the piston magnet is built-in for this sensing.
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