Airtac SDAD Double Rod Slim Cylinder SDAD20X85SB
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X85SB is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm bore, 85mm 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
- Stroke85 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 SDAD20X85SB
The AirTAC SDAD20X85SB is a compact double-acting cylinder featuring an 8mm through-rod exiting both ends of its riveted body. Because the rod occupies both chambers, the annular area is identical on extend and retract, yielding equal push and pull force of 131.9 N at 0.5 MPa. This symmetric output is highly advantageous for loads requiring consistent driving force in both directions.
This specific configuration includes an 85mm stroke and male M6x1.0 rod threads on both ends. The built-in magnet supports AirTAC reed or electronic switches for position sensing, while the fixed NBR bumper decelerates the piston at stroke ends without acting as a lock. Operating speed spans 30-500 mm/s.
Airtac SDAD Double Rod Slim Cylinder SDAD20X85SB Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X85SB |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 85 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 SDAD20X85SB
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | Bore size in mm. |
| ×85 | 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 SDAD20X85SB Is Used
Symmetric Transfer
Drives a gripper on one end and a position dog on the opposite end, utilizing the 131.9 N equal force for consistent bidirectional part transfer.
Anti-Twist Guide
The dual 8mm rods resist rotational torque during vertical clamping, maintaining precise alignment without needing external guide rods.
Dual-End Stamping
Mounts a male M6x1.0 tooling fixture on one end while the opposite rod drives a secondary mechanism, fitting within tight axial spaces.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X85SB the Right Cylinder?
When sizing this 20mm bore, compare it to its neighbors: the SDAD16 provides 86.4 N at 0.5 MPa, while the SDAD25 offers 206.2 N. The 131.9 N output here gives a safe working load of roughly 79 N (about 60% of the 0.5 MPa figure), translating to a vertical lift of 6.7 kg with a 2:1 safety margin. The through-rod design resists twisting and allows mounting a tool on one end and a dog on the other. Note that a plain cylinder drifts on air loss; use an external rod lock or pilot-operated check valve for load holding. This unit features an M5x0.8 port, the -S magnet, and -B male rods.
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 SDAD20X85SB FAQ
The double-rod design provides equal force in both directions: 131.9 N at 0.5 MPa, 184.7 N at 0.7 MPa, and a theoretical maximum of 27 kgf at 1.0 MPa.
The through-rod prevents twisting and allows tooling on both ends. The -B option provides male M6x1.0 threads on both rods, and the -S magnet enables use with AirTAC reed or electronic switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SDAD Cylinders
Request a Quote for Airtac SDAD Double Rod Slim Cylinder SDAD20X85SB
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.