Airtac SDAD Double Rod Slim Cylinder SDAD25X20S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD25X20S is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø25mm 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.
- BoreØ25 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM5×0.8 (F) / M8×1.25 (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 SDAD25X20S
The AirTAC SDAD25X20S is a compact double-acting cylinder featuring a 25mm bore and 20mm stroke, with a piston rod extending from both ends of its riveted body. Because the rod occupies both chambers, the annular area is identical in each direction, yielding an equal push and pull force of 206.2 N at 0.5 MPa. This symmetric output is ideal for balanced tooling, while the through-rod geometry inherently resists twisting during operation.
Equipped with a built-in magnet (-S), this unit supports AirTAC reed or electronic solid-state switches for position sensing. The short body design drastically reduces axial mounting depth compared to conventional cylinders. End-of-stroke deceleration is handled by a fixed NBR bumper at each end, which absorbs shock but is not an adjustable air cushion. Operating speed ranges from 30 to 500 mm/s, and the M5x0.8 port supplies air efficiently to the 10mm rods.
Airtac SDAD Double Rod Slim Cylinder SDAD25X20S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD25X20S |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 mm |
| Acting type | Double acting, rod both ends |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 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 (Ø25mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 206 N |
| 0.7 MPa | 289 N |
| Max (@1.0 MPa) | 42 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 SDAD25X20S
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 25 | 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 SDAD25X20S Is Used
Symmetric Transfer Arms
Drives a pick-and-place arm where the 206.2 N equal force ensures smooth acceleration and deceleration of a 10.5 kg vertical payload in both directions.
Twin-Side Gauging Fixture
Mounts a workpiece contact on one rod end and a reed switch dog on the opposite end, using the anti-rotation through-rod to maintain precise measurement alignment.
Compact Carton Flap Folder
Fits into tight machinery profiles using the short riveted body, folding packaging flaps simultaneously from both sides within the 20mm stroke.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD25X20S the Right Cylinder?
When sizing this model, compare its 206.2 N output at 0.5 MPa against adjacent bores: the SDAD20 provides 131.9 N, while the SDAD32 offers 345.6 N. For this 25mm bore, a safe working load is approximately 124 N (about 60% of the 0.5 MPa figure), allowing a vertical lift of roughly 10.5 kg with a 2:1 safety margin. The dual-end rod lets you mount a tool on one side and a positioning dog on the other, preventing rotation. This configuration includes female M5x0.8 rod-end threads and the -S magnet for sensing.
Remember that a standard compact cylinder cannot hold a load if air pressure drops or the valve is centered; the piston will drift. The fixed NBR bumper only decelerates the stroke near the ends and does not act as a lock. For secure load holding without live pressure, install an external rod lock or a pilot-operated check valve in your circuit.
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 SDAD25X20S FAQ
The push and pull forces are equal because the rod exits both ends. It generates 206.2 N at 0.5 MPa, 288.6 N at 0.7 MPa, and a theoretical maximum of 42 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
No, a plain double-rod cylinder drifts if air is lost or the valve is centered. The fixed NBR bumper only decelerates the stroke near the end points; it does not lock the piston. For load holding, you must add an external rod lock or pilot-operated check valve.
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