Airtac SDAD Double Rod Slim Cylinder SDAD50X55B
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X55B is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø50mm 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.
- BoreØ50 mm
- Stroke55 mm
- Port sizePT1/4
- Acting typeDouble acting, double rod
- Rod threadM10×1.5 (F) / M18×1.5 (B)
- CushionFixed NBR bumper (both ends)
About the Airtac SDAD Double Rod Slim Cylinder SDAD50X55B
The AirTAC SDAD50X55B is a double-acting compact 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, yielding an equal push and pull force of 824.7 N at 0.5 MPa. This symmetry is highly advantageous when driving loads that require consistent momentum in both strokes.
This specific configuration includes male M18x1.5 rod threads on both ends, allowing direct mounting of tooling. The 50 mm bore uses a PT1/4 air port and operates at speeds between 30 and 500 mm/s. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, and the short body design significantly reduces axial mounting depth compared to standard round-body options.
Airtac SDAD Double Rod Slim Cylinder SDAD50X55B Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X55B |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 55 mm |
| Acting type | Double acting, rod both ends |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa | 1155 N |
| Max (@1.0 MPa) | 168 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 SDAD50X55B
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 50 | 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 SDAD50X55B Is Used
Symmetric Transfer
Drives a shuttle mechanism back and forth with 824.7 N of equal force in both directions, ensuring consistent acceleration without twisting.
Balanced Lift Station
Lifts and lowers a 42 kg platen vertically using the male M18x1.5 rods, maintaining stable alignment through the dual-end through-rod design.
Dual-End Sealing
Actuates a sealing head on one rod end while using the opposite protruding end to trigger a mechanical dog, saving axial space in the cell.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X55B the Right Cylinder?
When sizing this model, consider the neighboring bores: stepping down to the SDAD40 provides 527.8 N at 0.5 MPa, while stepping up to the SDAD63 yields 1401.5 N at 0.5 MPa. For the SDAD50X55B, a safe working load is approximately 495 N (about 60 percent of the 0.5 MPa figure), translating to a vertical lift capacity of roughly 42 kg with a 2:1 safety margin. The through-rod geometry prevents twisting and permits driving a tool on one end while mounting a dog on the opposite end.
This SKU lacks the -S magnet option, meaning it cannot support reed or electronic switches. Furthermore, a standard double-acting cylinder does not hold position if air pressure is lost or the valve is centered; the piston will drift. For load-holding applications without live pressure, integrate an external rod lock or a pilot-operated check valve. Confirm your application requires the male M18x1.5 rod thread specified by the -B code.
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 SDAD50X55B FAQ
The double-rod design provides equal force in both directions: 824.7 N at 0.5 MPa and 1154.5 N at 0.7 MPa. The theoretical maximum is 168 kgf at 1.0 MPa.
Yes, the through-rod exits both ends with male M18x1.5 threads, allowing you to drive a tool on one side and mount a dog or secondary mechanism on the other while resisting rotational twist.
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