Airtac SDAD Double Rod Slim Cylinder SDAD20X20
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X20 is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm 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.
- BoreØ20 mm
- Stroke20 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 SDAD20X20
The AirTAC SDAD20X20 is a double-acting compact cylinder featuring a through-rod that exits both ends of the riveted body. Because the rod occupies both chambers, the annular area is identical in each direction, giving you exactly 131.9 N of push and pull force at 0.5 MPa. This symmetry prevents twisting and simplifies balancing for neutral tooling loads.
With an 8 mm rod diameter and a short 20 mm stroke, this unit fits into tight machinery where axial depth is restricted. The fixed NBR bumper at each end decelerates the piston near stroke extremes, operating effectively across a 30-500 mm/s speed range without requiring adjustable air cushioning.
Airtac SDAD Double Rod Slim Cylinder SDAD20X20 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X20 |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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 SDAD20X20
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | 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 SDAD20X20 Is Used
Symmetric Transfer Jaws
Drives a gripper on one rod end and a tracking dog on the other, utilizing the 131.9 N equal push/pull force to move light parts without rotational deflection.
Compact Pin Insertion
Fits into shallow machine frames using its 20 mm stroke and short riveted body, pressing small pins with a stable 6.7 kg vertical lift margin.
Dual-Side Strip Clamping
Secures a workpiece from both edges simultaneously via the through-rod, ensuring balanced holding during light machining without twisting.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X20 the Right Cylinder?
When sizing this 20 mm bore, compare its 131.9 N @0.5 MPa output against neighboring bores: the SDAD16 yields 86.4 N, while the SDAD25 provides 206.2 N. This makes the SDAD20X20 ideal for a safe working load around 79 N (roughly 60% of its 0.5 MPa capacity) or a vertical lift of 6.7 kg with a 2:1 safety margin. The through-rod geometry allows driving a tool on one end while mounting a dog on the opposite end.
This specific SKU lacks a piston magnet, so it cannot support reed or electronic switches without upgrading to the -S variant. It features female M4x0.7 rod-end threads and an M5x0.8 air port. Remember that a standard cylinder drifts when air is lost or the valve centers; the fixed bumper only decelerates the stroke end and will not hold the load. Use an external rod lock or pilot-operated check valve for secure load holding.
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 SDAD20X20 FAQ
The double-rod design provides equal force in both directions: 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa. The theoretical maximum is 27 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
No, this specific SKU does not have a piston magnet. To use AirTAC reed or electronic switches, you must select the SDAD20X20S variant. The through-rod still allows dual-end mounting for external dogs or mechanical sensors.
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