Airtac SDAD Double Rod Slim Cylinder SDAD50X85
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X85 is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø50mm 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.
- BoreØ50 mm
- Stroke85 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 SDAD50X85
The AirTAC SDAD50X85 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, yielding equal push and pull forces of 824.7 N at 0.5 MPa. This symmetry is ideal for driving loads that require consistent thrust and retraction without twisting.
This 50 mm bore model uses a 20 mm rod and a PT1/4 port, operating at speeds from 30-500 mm/s. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Note this specific SKU lacks a piston magnet, so it cannot directly host reed or electronic switches without choosing the -S variant.
Airtac SDAD Double Rod Slim Cylinder SDAD50X85 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X85 |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 85 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 SDAD50X85
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 50 | 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 SDAD50X85 Is Used
Web Guiding Mechanism
Utilizes the anti-rotation through-rod to steer film or foil evenly, ensuring the 824.7 N bidirectional force keeps tracking symmetric without twisting.
Dual-End Transfer Jig
Mounts a grip on one rod end and a cam dog on the opposite, synchronizing an 85 mm parts handover while maintaining equal push and pull thrust.
Balanced Lift Station
Raises and lowers a 42 kg platen vertically, exploiting the equal annular force to provide stable lifting and lowering without drift bias.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X85 the Right Cylinder?
When sizing this actuator, compare its 824.7 N thrust at 0.5 MPa with adjacent bores: the SDAD40 provides 527.8 N, while the SDAD63 offers 1401.5 N. Based on the 824.7 N figure, a safe working load is approximately 495 N (60 percent capacity), translating to a vertical lift capability of about 42 kg with a 2:1 safety margin.
The through-rod geometry prevents rotation and permits mounting a tool on one end while using the opposite end for a mechanical dog. Remember that a standard cylinder drifts when air is removed or the valve centers, as the fixed bumper only decelerates near stroke end and acts as neither a lock nor a brake. For load holding without live pressure, integrate an external rod lock or pilot-operated check valve. This configuration features an 85 mm stroke, female M10x1.5 rod threads, and no magnet.
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 SDAD50X85 FAQ
The push and pull forces are equal because the rod exits both ends. It generates 824.7 N at 0.5 MPa and 1154.5 N at 0.7 MPa, with a theoretical maximum of 168 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
No, this specific SKU does not include a piston magnet, so it cannot host reed or electronic switches. You would need the SDAD50X85S variant to enable switch sensing along the body grooves.
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