Airtac SDAD Double Rod Slim Cylinder SDAD20X40
The AirTAC Airtac SDAD Double Rod Slim Cylinder SDAD20X40 is a genuine double-acting COMPACT cylinder with a piston rod out BOTH ends (Ø20mm 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.
- BoreØ20 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod
- Rod threadM4×0.7 (F) / M6×1.0 (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 SDAD20X40
The AirTAC SDAD20X40 is a compact double-acting 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 131.9 N at 0.5 MPa. This symmetry is essential when driving loads that require consistent momentum in both strokes.
The short body design drastically reduces axial mounting depth compared to standard round-body options. It uses an 8 mm piston rod at each end, an M5x0.8 air port, and relies on a fixed NBR bumper to decelerate the stroke end. Note this SKU lacks a piston magnet, so position sensing is not supported without upgrading to the -S variant.
Airtac SDAD Double Rod Slim Cylinder SDAD20X40 Technical Specifications
| Model | Airtac SDAD Double Rod Slim Cylinder SDAD20X40 |
|---|---|
| Series | SDAD compact double-rod cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Acting type | Double acting, rod both ends |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 90 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 (Ø20mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 132 N |
| 0.7 MPa | 185 N |
| Max (@1.0 MPa) | 27 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 SDAD20X40
| SDAD | Compact double-acting cylinder, rod out both ends. |
|---|---|
| 20 | 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 SDAD20X40 Is Used
Symmetric Transfer Jaws
Drives a gripping jaw set with identical 131.9 N force on both extend and retract, ensuring parts are clamped and released without shifting momentum.
Anti-Rotation Guide Pins
The dual through-rod resists twisting during vertical pin insertion, maintaining alignment where a single rod would bind under off-center loads.
Dual-End Profiling
Mounts a cutting blade on the front rod while a mechanical dog rides on the rear, allowing external cam tracking without sacrificing the 40 mm working stroke.
Is the Airtac SDAD Double Rod Slim Cylinder SDAD20X40 the Right Cylinder?
When sizing this unit, consider the neighbouring bores: stepping down to the SDAD16 yields 86.4 N at 0.5 MPa, while moving up to the SDAD25 provides 206.2 N. The 131.9 N output here translates to a safe working load of roughly 79 N at a 60% derating, or a vertical lift capacity of about 6.7 kg with a 2:1 safety margin.
The through-rod geometry resists twisting and permits mounting a tool on one end with a dog on the opposite side. Remember that a plain cylinder drifts if air pressure drops or the valve centres; the fixed bumper only decelerates near the stroke end and will not hold the load. For secure load holding, install an external rod lock or pilot-operated check valve. This configuration has a 40 mm stroke, female M4x0.7 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 SDAD20X40 FAQ
The push and pull forces are equal because the rod exits both ends. It generates 131.9 N at 0.5 MPa, 184.7 N at 0.7 MPa, and a theoretical maximum of 27 kgf at 1.0 MPa. The maximum operating pressure is 1.0 MPa.
Yes, the through-rod design allows you to drive a load on one side while using the opposite end for external tracking. However, this specific SKU has no piston magnet, so it cannot trigger AirTAC reed or electronic switches directly; you would need the -S magnet option for internal sensing.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SDAD Cylinders
Request a Quote for Airtac SDAD Double Rod Slim Cylinder SDAD20X40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.