Airtac SDAD Double Rod Slim Cylinder SDAD50X85S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X85S 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 SDAD50X85S
The AirTAC SDAD50X85S is a compact double-acting cylinder featuring a piston rod protruding from both ends of its riveted body. Because a rod occupies each chamber, the annular area is identical on extend and retract, yielding equal push and pull force of 824.7 N at 0.5 MPa. This symmetry is highly advantageous for driving loads that require consistent kinetic energy in both directions.
Equipped with a built-in magnet (-S), this unit supports AirTAC reed or electronic switches for end-position sensing. The 50 mm bore pairs a 20 mm rod with a PT1/4 port, while the fixed NBR bumpers decelerate the 85 mm stroke at both ends. The short body profile saves axial mounting depth compared to standard round-body cylinders, fitting easily into tight machine frames.
Airtac SDAD Double Rod Slim Cylinder SDAD50X85S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X85S |
|---|---|
| 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 SDAD50X85S
| 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 SDAD50X85S Is Used
Symmetric Transfer Clamp
Equal 824.7 N force in both directions ensures a transfer clamp grips and releases components with identical kinetic energy on the 85 mm stroke.
Dual-End Gauging Station
The anti-rotation through-rod mounts a measuring dog on one end and a work tool on the other, maintaining precise alignment during inspection.
Vertical Lift Fixture
Lifts up to 42 kg vertically with a 2:1 safety margin, relying on the compact riveted body to save axial depth in tight elevating platforms.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X85S the Right Cylinder?
When sizing this model, compare its 824.7 N output at 0.5 MPa against adjacent bores: the SDAD40 provides 527.8 N, whereas the SDAD63 offers 1401.5 N. For your 50 mm bore at 85 mm stroke, the 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 design resists twisting and allows a dog to trigger a switch on one end while the opposite end drives the tool.
Remember that a plain cylinder drifts when air is lost 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, install an external rod lock or pilot-operated check valve. This configuration includes the -S magnet for sensing and female M10x1.5 rod-end threads on both sides.
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 SDAD50X85S FAQ
The double-rod design provides equal force in both directions: 824.7 N at 0.5 MPa, 1154.5 N at 0.7 MPa, and a theoretical maximum of 168 kgf at 1.0 MPa.
Yes, the through-rod exits both ends, allowing you to drive a tool on one side while mounting a reed or electronic switch (enabled by the -S magnet) on the opposite side.
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