Airtac SDAD Double Rod Slim Cylinder SDAD40X20B
The AirTAC SDAD Double Rod Slim Cylinder SDAD40X20B is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø40mm 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.
- BoreØ40 mm
- Stroke20 mm
- Port sizePT1/8
- Acting typeDouble acting, double rod
- Rod threadM8×1.25 (F) / M14×1.5 (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 SDAD40X20B
The AirTAC SDAD40X20B 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, yielding equal push and pull forces of 527.8 N at 0.5 MPa. This symmetry is ideal for driving loads that require consistent kinetic energy regardless of travel direction.
This specific SKU includes male M14x1.5 threads on both 16 mm rod ends, allowing direct external mounting. The short body design minimizes axial footprint, while fixed NBR bumpers absorb end-of-stroke shock. Note that this variant lacks a piston magnet, so position sensing is not supported without switching to an -S option.
Airtac SDAD Double Rod Slim Cylinder SDAD40X20B Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X20B |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting, rod both ends |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 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 (Ø40mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 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 SDAD40X20B
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 40 | 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 SDAD40X20B Is Used
Web Edge Guiding
Uses the dual male M14x1.5 rod ends to mount opposing guide rollers, leveraging the 527.8 N equal force to keep material tracking straight without rotational deflection.
Transfer Shuttle
Moves parts between two stations with identical push and pull kinetics, ensuring stable deceleration against the fixed NBR bumpers at both 20 mm stroke endpoints.
Lift and Lower Jig
Raises and lowers a 26.9 kg fixture vertically, relying on the anti-rotation through-rod to prevent the platform from twisting during the transition.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X20B the Right Cylinder?
When sizing this unit, compare its bidirectional 527.8 N output at 0.5 MPa against adjacent bores: the SDAD32 provides 345.6 N, whereas the SDAD50 offers 824.7 N. The through-rod geometry prevents twisting and permits mounting a tool on one end and a dog on the opposite side.
Confirm the 40 mm bore, 20 mm stroke, and PT1/8 port match your pneumatic layout. The male M14x1.5 rod threads are present on both sides, so ensure adequate clearance for the protruding rods. Remember that a standard cylinder drifts when air pressure is lost or the valve centers; utilize an external rod lock or pilot-operated check valve if the load must be held in place.
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 SDAD40X20B FAQ
The push and pull forces are equal because the rod exits both ends. It generates 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa, with a theoretical maximum of 108 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
Yes, the through-rod design resists twisting and allows you to drive a tool on one end while using the opposite end for a secondary mechanism. This specific B-option features male M14x1.5 threads on both 16 mm rods for direct attachment.
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