Airtac SDAD Double Rod Slim Cylinder SDAD40X20S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD40X20S 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 SDAD40X20S
The AirTAC SDAD40X20S 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 exactly 527.8 N of push and pull force at 0.5 MPa. This symmetric output is ideal for balanced tooling.
The integrated -S piston magnet supports AirTAC reed or electronic switches for end-position sensing. A fixed NBR bumper decelerates the stroke ends, while the short body footprint saves axial mounting depth compared to standard round-body units. The 16 mm rods and PT1/8 port keep installation straightforward.
Airtac SDAD Double Rod Slim Cylinder SDAD40X20S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X20S |
|---|---|
| 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 SDAD40X20S
| 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 SDAD40X20S Is Used
Symmetric Transfer Gripper
Drives a dual-jaw gripper where the equal 527.8 N extend and retract forces prevent twisting during high-speed part transfers.
Dual-End Positioning Stop
Mounts a physical stop on the front rod and a magnetic dog on the rear, triggering a reed switch without adding axial length.
Vertical Lift Fixture
Raises a 26.9 kg payload using the through-rod geometry to maintain anti-rotation stability throughout the 20 mm travel.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X20S the Right Cylinder?
When sizing this 40 mm bore, note the SDAD32 provides 345.6 N and the SDAD50 offers 824.7 N at 0.5 MPa. The SDAD40X20S sits perfectly in the middle, delivering 527.8 N both ways. The through-rod design resists twisting and permits mounting a tool on one end and a dog on the opposite side.
This unit includes the -S magnet for reed or electronic sensing and female M8x1.25 rod threads. Remember that a plain cylinder drifts when air is lost or the valve centers; the fixed bumper only decelerates near stroke end. For secure load holding without live pressure, 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 SDAD40X20S FAQ
Because the double-rod design provides equal annular area in both directions, push and pull forces are identical: 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and a theoretical maximum of 108 kgf at 1.0 MPa.
Yes, the through-rod resists rotation and allows you to drive a tool on one end while mounting a dog for a reed or electronic switch on the other. Ensure you leave clearance for the 16 mm rod exiting both ends.
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