Airtac SDAD Double Rod Slim Cylinder SDAD50X20SB
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X20SB 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 SDAD50X20SB
The AirTAC SDAD50X20SB is a double-acting compact cylinder featuring a 50 mm bore and 20 mm stroke. Because the piston rod exits both ends, the annular area remains identical in both chambers, delivering an equal push and pull force of 824.7 N at 0.5 MPa. This symmetric output is a major advantage when driving loads that require consistent kinetic energy in both directions.
This specific configuration includes a built-in magnet for position sensing alongside male M18x1.5 rod threads on both ends. The short riveted body saves axial mounting depth where a standard round-body or profile cylinder will not fit. 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 SDAD50X20SB Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X20SB |
|---|---|
| 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 SDAD50X20SB
| 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 SDAD50X20SB Is Used
Symmetric Transfer Unit
Drives a gripper on one rod end and a dog on the opposite end, utilizing the equal 824.7 N extend and retract forces to move components without rotational deflection.
Balanced Lift Station
Lifts a 42 kg vertical payload with a 2:1 margin, relying on the through-rod to resist twisting during elevation and descent within a tight machine footprint.
Dual-End Sealing Press
Mounts a male M18x1.5 tooling head on each side to crimp two carton flaps simultaneously, taking advantage of the compact riveted body to minimize axial depth.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X20SB the Right Cylinder?
When sizing this unit, compare its 824.7 N output at 0.5 MPa against adjacent bores: the SDAD40 provides 527.8 N, while the SDAD63 yields 1401.5 N. A practical safe working load is roughly 495 N, utilizing about 60 percent of the 0.5 MPa figure, which allows for a vertical lift of approximately 42 kg with a 2:1 safety margin. The through-rod geometry resists twisting and lets you mount a tool on one end while tracking position with a reed or electronic switch on the opposite end.
Remember that a plain pneumatic cylinder does not hold its load if air pressure drops or the valve centers; the piston will drift, and the fixed bumper only decelerates near the stroke end. For load holding without live pressure, integrate an external rod lock or a pilot-operated check valve. This model features a PT1/4 port, a 20 mm rod diameter, and the male M18x1.5 threads on both rods as specified by the B option.
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 SDAD50X20SB FAQ
The double-rod design provides equal force in both directions: 824.7 N at 0.5 MPa and 1154.5 N at 0.7 MPa. The theoretical maximum is 168 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
Yes, the through-rod resists rotation and allows you to drive a tool on one end while mounting a dog on the other. The built-in S magnet works with AirTAC reed or electronic switches, and the B option provides male M18x1.5 threads on both ends.
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