Airtac SDAD Double Rod Slim Cylinder SDAD40X70B
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD40X70B 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 SDAD40X70B
The AirTAC SDAD40X70B is a double-acting compact cylinder featuring a through-rod that exits both ends of the riveted body. Because the rod occupies each chamber equally, the annular area matches on extend and retract, delivering an identical 527.8 N of push and pull force at 0.5 MPa. This symmetry is ideal for driving loads that require consistent momentum in both travel directions.
Equipped with the -B option, this specific unit features male M14x1.5 thread on both 16 mm rod ends, allowing direct mounting of female-threaded tooling. The short body design minimizes axial footprint, while fixed NBR bumpers absorb end-of-stroke kinetic energy. Note that this SKU lacks a piston magnet, so position sensing is not supported without upgrading to the -S variant.
Airtac SDAD Double Rod Slim Cylinder SDAD40X70B Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD40X70B |
|---|---|
| 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 SDAD40X70B
| 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 SDAD40X70B Is Used
Parallel Edge Guiding
Uses the equal 527.8 N extend and retract force to consistently center sheet metal, while the dual male M14x1.5 rod ends mount opposing guide blocks without twisting.
Reciprocating Transfer
Drives a shuttle carriage back and forth at 30-500 mm/s, leveraging the through-rod anti-rotation property to keep the payload stable during rapid directional changes.
Dual-Side Sealing
Mounts a sealing jaw on one rod end and a cam follower on the opposite end, allowing external tracking while the 70 mm stroke cycles packaging film with balanced force.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD40X70B the Right Cylinder?
When sizing this 40 mm bore actuator, evaluate your force margins carefully. Dropping down to the SDAD32 yields 345.6 N at 0.5 MPa, which might under-power a symmetric load, whereas stepping up to the SDAD50 provides 824.7 N for heavier tooling. For the SDAD40X70B, the safe working load is approximately 317 N (about 60 percent of the 0.5 MPa rating), translating to a vertical lift capacity of roughly 26.9 kg with a 2:1 safety margin.
The through-rod geometry inherently resists twisting, providing superior anti-rotation stability compared to single-rod designs, and allows you to drive a workpiece on one end while leaving the opposite end clear for mechanical stops. Remember that a standard cylinder drifts when air pressure is lost or the valve centers; the NBR bumper only decelerates the stroke end and will not hold a load. For vertical load holding, integrate an external rod lock or a pilot-operated check valve. This configuration includes a PT1/8 port, 70 mm stroke, no magnet, and male M14x1.5 rod 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 SDAD40X70B FAQ
Because the double-rod design provides equal annular area in both directions, push and pull forces are identical: 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and a theoretical maximum of 108 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
No, this specific SKU does not have a piston magnet, so it cannot trigger reed or electronic switches. You would need the SDAD40X70BS variant to enable sensing. However, the through-rod design still allows you to mount a physical dog or target on the opposite rod end for external sensor tracking.
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