Airtac SDAD Double Rod Slim Cylinder SDAD20X55
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X55 is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm bore, 55mm 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
- Stroke55 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 SDAD20X55
The AirTAC SDAD20X55 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 on extend and retract, yielding an equal push and pull force of 131.9 N at 0.5 MPa. This symmetry is a major advantage when driving loads that require consistent kinetic energy in both directions.
Saving valuable axial mounting depth, the short body integrates a fixed NBR bumper at each end to decelerate the stroke. The 8 mm rods provide built-in geometric resistance to twisting. This specific SKU lacks a piston magnet, so it cannot accept position switches without upgrading to the -S variant.
Airtac SDAD Double Rod Slim Cylinder SDAD20X55 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X55 |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 55 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 SDAD20X55
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | Bore size in mm. |
| ×55 | 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 SDAD20X55 Is Used
Gripper Jaw Sync
Drives opposing gripper jaws where the 131.9 N bidirectional force ensures symmetric clamping pressure on delicate components.
Transfer Pusher
Pushes parts across a belt with equal extend and retract energy, while the short riveted body fits tight conveyor frames.
Dual-End Cam
Mounts a work tool on one rod end and a cam dog on the opposite end to trigger external mechanical signals.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X55 the Right Cylinder?
When sizing this unit, consider the adjacent bores: the SDAD16 yields 86.4 N at 0.5 MPa, while the SDAD25 provides 206.2 N. The 131.9 N output here translates to a safe working load of roughly 79 N (about 60 percent of capacity) or a vertical lift of approximately 6.7 kg with a 2:1 margin. The through-rod design allows you to mount a tool on one end and a dog on the opposite end simultaneously.
This configuration features a 20 mm bore, 55 mm stroke, and an M5x0.8 port. It has female M4x0.7 rod-end threads. Remember that a standard cylinder does not hold position if air pressure drops; the piston will drift. For 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 SDAD20X55 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.
No, this specific SKU does not include a piston magnet. You must select the -S variant to use AirTAC reed or electronic switches for position sensing.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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