Airtac SDAD Double Rod Slim Cylinder SDAD25X85S
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD25X85S is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø25mm 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.
- BoreØ25 mm
- Stroke85 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM5×0.8 (F) / M8×1.25 (B)
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDAD Double Rod Slim Cylinder SDAD25X85S
The AirTAC SDAD25X85S 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, delivering an equal push and pull force of 206.2 N at 0.5 MPa. This symmetry is ideal for driving loads that require consistent kinetic output regardless of travel direction.
The 85 mm stroke operates at speeds between 30 and 500 mm/s, while the short body geometry drastically reduces axial mounting depth compared to conventional round-body alternatives. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Equipped with a built-in piston magnet, this unit supports position detection using either reed or electronic switches mounted in the body grooves.
Airtac SDAD Double Rod Slim Cylinder SDAD25X85S Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD25X85S |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø25 mm |
| Stroke | 85 mm |
| Acting type | Double acting, rod both ends |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 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 (Ø25mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 206 N |
| 0.7 MPa | 289 N |
| Max (@1.0 MPa) | 42 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 SDAD25X85S
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 25 | 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 SDAD25X85S Is Used
Gripper Jaw Actuation
Provides perfectly symmetric 206.2 N clamping force in both directions, ensuring robotic grippers maintain equal pressure during part pickup and release cycles.
Dual-End Transfer Mechanism
Drives a workpiece on one rod end while a position dog triggers a sensor on the opposite end, utilizing the anti-rotation through-rod to prevent mechanical twisting.
Compact Pin Insertion
Fits into tight machine envelopes where axial depth is restricted, using the fixed NBR bumper to absorb the 85 mm stroke impact during rapid assembly operations.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD25X85S the Right Cylinder?
When sizing this 25 mm bore model, compare its 206.2 N output at 0.5 MPa against its neighbors: the smaller SDAD20 provides 131.9 N, while the larger SDAD32 yields 345.6 N. The through-rod design resists twisting and allows you to mount a work tool on one end and a position dog on the opposite side. A safe working load is approximately 124 N (about 60 percent of the 0.5 MPa figure), translating to a vertical lift capacity of roughly 10.5 kg with a 2:1 safety margin.
This configuration includes the -S magnet option for sensing and uses an M5x0.8 port with a female M5x0.8 rod-end thread. Note that a standard cylinder does not hold position if air pressure drops or the valve centers; the piston will drift. For load holding without live pressure, integrate 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 SDAD25X85S FAQ
The double-rod design provides equal force in both directions: 206.2 N at 0.5 MPa and 288.6 N at 0.7 MPa. The theoretical maximum is 42 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 through-rod resists rotation and allows you to mount a tool on one end and a dog on the other. The -S magnet option enables position detection using AirTAC reed or electronic switches in the body grooves.
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