Airtac SDAD Double Rod Slim Cylinder SDAD20X70B
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X70B is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm bore, 70mm 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
- Stroke70 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 SDAD20X70B
The AirTAC SDAD20X70B 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 an equal push and pull force of 131.9 N at 0.5 MPa. This symmetric output is highly advantageous for loads requiring consistent drive and retraction energy.
This specific SKU includes male M6x1.0 threads on both rod ends and carries a 70 mm stroke. The short body geometry saves axial mounting depth where standard round-body units fail to fit. End-of-stroke deceleration is handled by a fixed NBR bumper, and the unit operates cleanly across a 30-500 mm/s speed range.
Airtac SDAD Double Rod Slim Cylinder SDAD20X70B Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X70B |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 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 SDAD20X70B
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 SDAD20X70B Is Used
Symmetric Transfer Jaws
Drives a pick-and-place gripper where the equal 131.9 N extend and retract forces ensure parts are seated and extracted without asymmetric acceleration.
Dual-End Pin Insertion
Uses the male M6x1.0 rod ends on both sides to press a fitting on one end while a mechanical dog trips an external limit switch on the opposite end.
Compact Strip Indexing
Fits into tight machine cells using the short riveted body to push a material strip 70 mm, relying on the through-rod to resist torsional side-load.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X70B the Right Cylinder?
When sizing this unit, evaluate the neighbouring bores: the SDAD16 yields 86.4 N at 0.5 MPa, while the SDAD25 provides 206.2 N at 0.5 MPa. For the 20 mm bore, a safe working load is roughly 79 N (about 60 percent of the 131.9 N capacity), translating to a vertical lift of approximately 6.7 kg with a 2:1 safety margin. Choose the 20 mm option when your payload sits comfortably in that middle band.
The through-rod geometry prevents twisting and permits mounting a tool on one end while driving a dog on the opposite side. Note that a plain cylinder drifts when air is lost or the valve centres; the fixed bumper only decelerates near stroke end and will not lock the load. For secure holding without live pressure, install an external rod lock or pilot-operated check valve. This configuration lacks the -S magnet, precluding switch sensing, and uses 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 SDAD20X70B FAQ
The push and pull forces are equal at 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. The maximum operating pressure is 1.0 MPa, with a proof pressure of 1.5 MPa.
The through-rod resists rotation and allows you to mount a tool on one end and a dog or secondary mechanism on the other. The male M6x1.0 threads on both ends simplify fixture attachment while maintaining identical force in both directions.
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