Airtac SDAD Double Rod Slim Cylinder SDAD50X40S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD50X40S is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø50mm bore, 40mm 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
- Stroke40 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 SDAD50X40S
The AirTAC SDAD50X40S 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 is identical on extend and retract, yielding equal push and pull force of 824.7 N at 0.5 MPa. This symmetry is ideal for driving loads that require consistent kinetic energy in both travel directions.
The short body design drastically reduces axial mounting depth compared to standard round-body alternatives. A 20 mm diameter piston rod exits both ends, providing inherent anti-rotation resistance and allowing you to mount a work tool on one side while fitting a reed or electronic switch on the opposite end to read position. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion.
Airtac SDAD Double Rod Slim Cylinder SDAD50X40S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD50X40S |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 40 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 SDAD50X40S
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 50 | Bore size in mm. |
| ×40 | 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 SDAD50X40S Is Used
Symmetric Transfer Chuck
Equal 824.7 N push and pull force securely grips and releases parts during bidirectional transfer without asymmetric acceleration.
Vertical Lift Fixture
Lifts approximately 42 kg with a 2:1 safety margin, using the dual-end rods to mount a guided carriage and a position dog simultaneously.
Anti-Twist Spot Welding
The through-rod resists torsional deflection during electrode contact, ensuring precise alignment while saving axial depth in a tight weld cell.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD50X40S the Right Cylinder?
When sizing this 50 mm bore model, compare its 824.7 N output at 0.5 MPa against its neighbours. Stepping down to the SDAD40 provides 527.8 N, whereas stepping up to the SDAD63 yields 1401.5 N. For your application, a safe working load is approximately 495 N (about 60 percent of the 0.5 MPa figure), which translates to a vertical lift capacity of roughly 42 kg with a 2:1 safety margin.
The through-rod geometry prevents twisting during operation and enables dual-end mounting. Note that a plain cylinder does not hold its load if air pressure drops or the valve centres; the piston will drift, as the fixed NBR bumper only decelerates near the stroke end. For load holding without live pressure, install an external rod lock or a pilot-operated check valve. This SDAD50X40S variant includes the S option for a built-in magnet and uses female M10x1.5 rod-end threads on both ends, with a PT1/4 port.
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 SDAD50X40S FAQ
Because the rod exits both ends, force is equal 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. Operating pressure ranges from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa.
Yes, the double-rod design allows you to drive a tool on one end while mounting a dog or reed/electronic switch on the opposite end. The S option includes a built-in piston magnet for AirTAC magnetic switches, and the through-rod inherently resists twisting.
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