Airtac SDAD Double Rod Slim Cylinder SDAD50X85SB
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X85SB 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 SDAD50X85SB
The AirTAC SDAD50X85SB is a compact double-acting cylinder featuring a through-rod that exits both ends of the riveted body. Because the piston rod occupies both chambers, the annular area remains identical on extension and retraction. This geometry yields equal push and pull force, delivering exactly 824.7 N at 0.5 MPa in each direction. The symmetric thrust is a major advantage when driving loads that require consistent kinetic energy regardless of travel direction.
This specific configuration includes a built-in magnet for position sensing alongside male M18x1.5 rod threads on both ends. The 50 mm bore uses a PT1/4 air port and a 20 mm piston rod. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion. The short body profile saves axial mounting depth, making it highly effective in tight machinery envelopes where longer profile cylinders cannot fit.
Airtac SDAD Double Rod Slim Cylinder SDAD50X85SB Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X85SB |
|---|---|
| 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 SDAD50X85SB
| 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 SDAD50X85SB Is Used
Symmetric Transfer Chuck
Equal 824.7 N force in both directions securely grips and releases delicate wafers without directional force bias.
Anti-Rotation Edge Guide
The dual-exit through-rod prevents mechanical twisting during high-speed web guiding, maintaining precise alignment.
Dual-End Forming Station
Mount a male M18x1.5 forming tool on one end and a position dog on the other to synchronize press operations.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X85SB the Right Cylinder?
When sizing this unit, compare its 824.7 N thrust at 0.5 MPa against adjacent bores. Stepping down to the SDAD40 provides 527.8 N, while stepping up to the SDAD63 yields 1401.5 N. For this 50 mm bore, a safe working load is approximately 495 N (about 60 percent of the 0.5 MPa figure), allowing a vertical lift of roughly 42 kg with a 2:1 safety margin. Choose this model when your mechanism demands balanced bidirectional power within a compact footprint.
The through-rod design inherently resists twisting and permits mounting a tool on one end while fitting a dog or switch on the opposite end. Because this variant carries the S option, it supports AirTAC reed or electronic solid-state switches via the body grooves. The B option specifies male M18x1.5 threads on both rods. Remember that a standard cylinder does not hold position on air loss or valve centering; the piston drifts. For load holding without live pressure, install an external rod lock or a 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 SDAD50X85SB FAQ
The push and pull forces are identical because the rod exits both ends. It generates 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. The operating pressure range is 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa.
Yes. The through-rod geometry allows you to drive a tool on one end while using the opposite end for a dog or switch. Because this model includes the S magnet option, you can fit AirTAC reed or electronic switches directly into the body grooves to detect position from either side.
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