Airtac SDAD Double Rod Slim Cylinder SDAD50X20B
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X20B 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 SDAD50X20B
The AirTAC SDAD50X20B 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 in each direction, giving an equal push and pull force of 824.7 N at 0.5 MPa. This symmetric output is ideal for balanced actuation without differential shifting.
This specific SKU includes male M18x1.5 thread on both 20 mm rod ends, allowing direct mounting of tooling. The short body design minimizes axial footprint, while end-of-stroke deceleration is handled by a fixed NBR bumper. Note this variant lacks a piston magnet and cannot support position sensing.
Airtac SDAD Double Rod Slim Cylinder SDAD50X20B Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X20B |
|---|---|
| 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 SDAD50X20B
| 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 SDAD50X20B Is Used
Equal-Force Clamping
Provides 824.7 N of identical push and pull force at 0.5 MPa for securing workpieces symmetrically without force imbalance.
Dual-End Transfer
The through-rod allows mounting a gripper on the male M18x1.5 end while the opposite side drives a secondary dog.
Anti-Rotation Lift
Lifts roughly 42 kg vertically with a 2:1 margin, relying on the twin rods to prevent platform twist during elevation.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X20B the Right Cylinder?
When sizing this 50 mm bore, compare its 824.7 N output at 0.5 MPa against adjacent models. Dropping down to the SDAD40 yields 527.8 N, whereas stepping up to the SDAD63 provides 1401.5 N. Applying a 2:1 safety margin to the 0.5 MPa figure gives a safe working load of roughly 495 N, translating to a vertical lift capacity of about 42 kg.
The through-rod geometry inherently resists twisting and permits driving a load on one end while using the opposite end for a secondary mechanism. Remember that a standard cylinder drifts when air is removed or a valve centers; utilize an external rod lock or pilot-operated check valve for strict load holding. This unit uses a PT1/4 port, a 20 mm stroke, male M18x1.5 rod threads, and no magnet.
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 SDAD50X20B FAQ
The double-rod design provides equal force in both directions: 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 operating pressure range is 0.15-1.0 MPa.
Yes, the through-rod exits both sides to resist twisting and allows tooling attachment on both ends. This specific B-option unit features male M18x1.5 threads on both 20 mm rod ends for direct mounting.
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