Airtac SDAD Double Rod Slim Cylinder SDAD40X20
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD40X20 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 SDAD40X20
The AirTAC SDAD40X20 is a compact double-acting cylinder featuring a piston rod protruding from both ends of its riveted body. Because a rod occupies both chambers, the annular area remains identical in either direction, yielding an equal push and pull force of 527.8 N at 0.5 MPa. This symmetry is highly advantageous when driving loads that require consistent kinetic energy regardless of travel direction.
The through-rod geometry inherently resists twisting, providing stable guidance for rigidly mounted tooling. Its short profile saves valuable axial mounting depth where a larger body would fail to fit. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. This specific SKU lacks a piston magnet, so it cannot directly host reed or electronic switches without upgrading to the -S variant.
Airtac SDAD Double Rod Slim Cylinder SDAD40X20 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X20 |
|---|---|
| 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 SDAD40X20
| 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 SDAD40X20 Is Used
Web Guiding Mechanism
Utilizes the equal 527.8 N force in both directions to tension and steer material webs without asymmetric drift, while the dual rods prevent rotational deflection.
Dual-End Transfer Jig
Mounts a gripper on the front rod and a dog on the rear rod, allowing precise 20 mm part transfers in confined spaces where axial depth is restricted.
Symmetric Lift Station
Raises and lowers a 26.9 kg payload vertically, benefiting from the matched extend and retract dynamics to maintain smooth, balanced motion throughout the cycle.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X20 the Right Cylinder?
When sizing this 40 mm bore, consider the neighbouring capacities at 0.5 MPa. Stepping down to the SDAD32 provides 345.6 N, whereas stepping up to the SDAD50 yields 824.7 N. Choose the 40 mm bore when your application demands roughly 527.8 N of symmetric thrust.
The through-rod design allows you to mount a work tool on one end and a dog or mechanical stop on the opposite end simultaneously. Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered; the fixed NBR bumper only decelerates the stroke end and does not function as a lock. For secure load holding, integrate an external rod lock or a pilot-operated check valve. This configuration features a 20 mm stroke, PT1/8 port, female M8x1.25 rod-end threads on both sides, and no magnet.
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 SDAD40X20 FAQ
The push and pull forces are identical due to the double-rod design. 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.
No, this specific SKU does not include a piston magnet, so it cannot trigger reed or electronic switches. You must select the SDAD40X20S variant to enable switch sensing in the body grooves.
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Standard models are processed and dispatched in 3-5 business days.
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