Airtac SDAD Double Rod Slim Cylinder SDAD25X20SB
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD25X20SB 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 SDAD25X20SB
The AirTAC SDAD25X20SB is a compact double-acting cylinder featuring a 25mm bore and 20mm stroke. Because the piston rod extends from both ends, the annular area remains identical in both chambers, ensuring push force exactly equals pull force at 206.2 N under 0.5 MPa. This symmetric output is ideal for balancing loads without tweaking pressure regulators.
The short riveted body minimizes axial footprint, fitting easily into tight machine frames. Equipped with a built-in magnet (-S) for AirTAC reed or electronic switches and male M8x1.25 threads (-B) on both rod ends, it simplifies dual-end tooling and position feedback. A fixed NBR bumper decelerates the stroke ends, and the through-rod geometry inherently resists twisting.
Airtac SDAD Double Rod Slim Cylinder SDAD25X20SB Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD25X20SB |
|---|---|
| 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 SDAD25X20SB
| 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 SDAD25X20SB Is Used
Symmetric Transfer Jaws
Equal push and pull force at 206.2 N ensures balanced gripping pressure on both extend and retract strokes for automated pick-and-place jaws.
Anti-Twist Guiding
The dual through-rod geometry resists rotational torque, maintaining precise alignment for thin-profile web guiding and edge-sealing fixtures.
Dual-End Tooling Station
Mount a forming punch on the male M8x1.25 front rod while a magnetic switch tracks the rear rod end, saving space in compact assembly cells.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD25X20SB the Right Cylinder?
When sizing this unit, consider the adjacent bores: the SDAD20 provides 131.9 N at 0.5 MPa, while the SDAD32 offers 345.6 N. The 25mm bore hits a practical middle ground, yielding a safe working load of roughly 124 N (about 60% of the 0.5 MPa rating) and a vertical lift capacity near 10.5 kg with a 2:1 safety margin. This specific configuration includes the male M8x1.25 rod threads and the -S magnet for solid-state or reed sensing.
The through-rod design allows you to mount a work tool on one end and a position dog on the opposite side. Remember that a standard cylinder drifts when air is removed or the valve centers; the fixed bumper only cushions the end of stroke. For suspended loads, integrate an external rod lock or pilot-operated check valve. Operating speed spans 30-500 mm/s.
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 SDAD25X20SB FAQ
The double-rod design provides equal force in both directions: 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 through-rod resists twisting and allows mounting tools on one end with a switch dog on the other. The -S enables reed or electronic sensing, while -B provides male M8x1.25 threads on both ends for direct attachment.
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