Airtac SDAD Double Rod Slim Cylinder SDAD25X20B
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD25X20B 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 SDAD25X20B
The AirTAC SDAD25X20B is a compact double-acting 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 exactly 206.2 N of push and pull force at 0.5 MPa. This symmetry is essential when driving loads that must move with equal authority on extension and retraction.
This specific SKU includes male M8x1.25 threads on the 10 mm piston rods. The short body design saves valuable axial mounting depth in tight machinery. End-of-stroke deceleration is handled by a fixed NBR bumper, and the unit operates smoothly between 30 and 500 mm/s. Note that this configuration lacks a piston magnet, so position sensing is not supported without the -S option.
Airtac SDAD Double Rod Slim Cylinder SDAD25X20B Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD25X20B |
|---|---|
| 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 SDAD25X20B
| 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 SDAD25X20B Is Used
Symmetric Transfer Chuck
Utilizes the equal 206.2 N force to grip and release delicate wafers with identical pressure on both strokes, preventing handling damage.
Anti-Rotation Guide Post
Exploits the dual-end through-rod to resist twisting during precision vertical pressing, keeping the tool plumb without external guides.
Dual-End Component Ejector
Mounts a pusher on one male M8x1.25 end and a mechanical dog on the other, allowing mechanical ejection while clearing space for a limit switch.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD25X20B the Right Cylinder?
When sizing this unit, consider the neighboring bores. Stepping down to the SDAD20 yields 131.9 N at 0.5 MPa, while stepping up to the SDAD32 provides 345.6 N. The 25 mm bore offers a calculated safe working load of roughly 124 N (about 60% of the 0.5 MPa rating), making it suitable for vertical lifts up to 10.5 kg with a 2:1 safety margin. The through-rod geometry prevents twisting and allows mounting a tool on one end and a dog on the opposite side.
This model features a 20 mm stroke, M5x0.8 air port, and male M8x1.25 rod threads on both ends. Remember that a standard cylinder drifts when air pressure is lost or the valve centers; the fixed NBR bumper only decelerates the stroke end and does not act as a lock. For load-holding requirements, install an external rod lock or pilot-operated check valve.
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 SDAD25X20B FAQ
Because it is a double-rod cylinder, the push and pull forces are identical: 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.
Yes. The through-rod design exits both sides, allowing you to drive a tool on one end and mount a dog or secondary mechanism on the other. This specific SKU has male M8x1.25 threads on both rod ends, but lacks a piston magnet for switch sensing.
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