Airtac SDAD Double Rod Slim Cylinder SDAD40X70
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD40X70 is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø40mm bore, 70mm 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.
- BoreØ40 mm
- Stroke70 mm
- Port sizePT1/8
- Acting typeDouble acting, double rod
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper (both ends)
About the Airtac SDAD Double Rod Slim Cylinder SDAD40X70
The AirTAC SDAD40X70 is a 40mm bore double-acting compact cylinder featuring a 70mm stroke and a through-rod exiting both ends. Because the rod occupies each chamber equally, extend and retract forces are identical at 527.8 N for 0.5 MPa, ensuring perfectly symmetric motion for your tooling. The short riveted body minimizes axial footprint where space is tight.
This unit uses a 16mm piston rod with PT1/8 ports and female M8x1.25 rod-end threads. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable cushion. Since this specific SKU lacks the S magnet suffix, it cannot accept magnetic switches.
Airtac SDAD Double Rod Slim Cylinder SDAD40X70 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X70 |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 mm |
| Acting type | Double acting, rod both ends |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 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 (Ø40mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 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 SDAD40X70
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SDAD40X70 Is Used
Gripper Jaw Sync
Drives opposing gripper jaws with identical 527.8 N force in both directions, ensuring parts are centered without rotational twist during pick and place.
Dual-End Transfer
Mounts a pusher plate on the front rod and a tracking dog on the rear rod, allowing external position reading while moving items along a line.
Balanced Lift Stage
Lifts a 26.9 kg vertical payload smoothly using the equal push-pull annular area, preventing sagging or uneven acceleration on the ascent.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X70 the Right Cylinder?
When sizing this model, compare its 527.8 N output at 0.5 MPa against adjacent bores: the SDAD32 provides 345.6 N, while the SDAD50 yields 824.7 N. A practical safe working load is roughly 317 N, allowing a vertical lift of about 26.9 kg with a 2:1 safety margin. The through-rod geometry resists twisting and permits driving a tool on one end while mounting a dog on the opposite side.
Note that a standard cylinder drifts when air pressure is lost or the valve centers, as the fixed bumper only decelerates near stroke end and acts as no brake. For load holding, utilize an external rod lock or pilot-operated check valve. This configuration includes a 40mm bore, 70mm stroke, PT1/8 port, female 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 SDAD40X70 FAQ
The double-rod design provides equal force in both directions: 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa. The theoretical maximum is 108 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
Yes, the through-rod resists twisting and allows tooling on one end with a dog on the opposite end. However, this specific SKU lacks the S magnet, so it cannot accept reed or electronic switches without upgrading to the -S variant.
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