Airtac SDAD Double Rod Slim Cylinder SDAD20X35SB
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X35SB is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm bore, 35mm 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.
- BoreØ20 mm
- Stroke35 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM4×0.7 (F) / M6×1.0 (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 SDAD20X35SB
The AirTAC SDAD20X35SB is a compact double-acting cylinder featuring an 8 mm through-rod exiting both ends of its riveted body. Because a rod occupies each chamber, the annular area matches on extend and retract, yielding identical push and pull forces of 131.9 N at 0.5 MPa. This symmetric output is ideal for balancing loads without tweaking pressure regulators.
The short body design drastically cuts axial mounting depth compared to standard profile cylinders. Equipped with a built-in magnet, it accepts reed or electronic switches in the body grooves. The male M6x1.0 thread on both rod ends allows direct attachment of tooling on one side and a position dog on the opposite end.
Airtac SDAD Double Rod Slim Cylinder SDAD20X35SB Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X35SB |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 35 mm |
| Acting type | Double acting, rod both ends |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 90 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 (Ø20mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 132 N |
| 0.7 MPa | 185 N |
| Max (@1.0 MPa) | 27 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 SDAD20X35SB
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | Bore size in mm. |
| ×35 | 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 SDAD20X35SB Is Used
Symmetric Transfer Arms
Drives a pick-and-place arm where the equal 131.9 N extend and retract forces prevent sagging on the return stroke.
Twin-End Gauging
Mounts a measuring contact on one male M6 rod end and a position dog on the opposite end for anti-rotation linear gauging.
Film Feed Tensioning
Uses the compact riveted body to fit in tight packaging frames, maintaining steady tension via both rod outputs.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X35SB the Right Cylinder?
When sizing this unit, consider the neighbouring bores: the SDAD16 provides 86.4 N at 0.5 MPa, while the larger SDAD25 offers 206.2 N. The 20 mm bore here hits a useful middle ground, providing a safe working load around 79 N (roughly 60 percent of the 0.5 MPa rating) and a vertical lift capacity near 6.7 kg with a 2:1 safety margin.
The through-rod geometry resists twisting during operation and lets you mount fixtures on both ends. Remember that the fixed NBR bumper only decelerates the stroke end; it will not hold a load if air pressure drops. For load holding without live pressure, install an external rod lock or pilot-operated check valve. This configuration includes the S magnet and B male M6x1.0 rod threads, operating at 30-500 mm/s via M5x0.8 ports.
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 SDAD20X35SB FAQ
The push and pull forces are identical because of the double-rod design. It generates 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa. The theoretical maximum is 27 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
The through-rod provides equal force in both directions and resists twisting. You can mount a tool on one male M6x1.0 threaded end and a reed or electronic switch dog on the opposite end, maximizing the 35 mm stroke utility.
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Covers non-human-caused product damage.
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