The AirTAC AirTAC SDA20X140 Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 140mm stroke, M5×0.8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA20X140 is a double-acting, single-rod compact cylinder engineered for tight axial spaces. It generates 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. Because the 140 mm stroke exceeds the 100 mm standard maximum for this 20 mm bore, this specific unit is manufactured as a non-standard, made-to-order configuration.
The short riveted body significantly reduces overall mounting depth compared to conventional round-body cylinders, making it ideal for dense machinery layouts. Deceleration at the stroke ends is handled by a fixed NBR bumper rather than an adjustable air cushion. This SKU is supplied without a piston magnet, so it cannot support magnetic position sensing; adding the -S option enables reed or electronic switch compatibility via the body grooves.
| Model | AirTAC SDA20X140 Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 140 mm |
| Acting type | Double acting |
| 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 |
Specifications follow the official AirTAC SDA compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard). Rod: female thread (blank) / male thread (B).
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×140 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard. Related SDA-family variants: SSA (single-acting push), STA (single-acting pull), SDAD (double rod), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Pushes lightweight cardboard cartons on a sorting line where the 140 mm travel clears the belt edge and the 8 mm rod handles the lateral redirect force.
Lower an electronic test probe array onto printed circuit boards, utilizing the compact body depth to fit within densely packed semiconductor inspection machinery.
Maintains dancer arm positioning on a vertical packaging film unwind stand, providing 131.9 N of retract pull at 0.5 MPa to prevent material slack.
When sizing this actuator, consider stepping to the adjacent bores: the SDA16 provides 100.5 N of push at 0.5 MPa for lighter duties, while the SDA25 offers 245.4 N for heavier loads. For this 20 mm bore, the safe working load is approximately 94 N (about 60% of the 157.1 N figure at 0.5 MPa), yielding a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. To order, confirm the 20 mm bore, 140 mm non-standard stroke, M5x0.8 port, and the female M4x0.7 rod-end thread.
Keep in mind that a standard compact cylinder does not hold its load if air pressure is lost or the valve is centered; the piston will drift, as the fixed NBR bumper only decelerates the stroke end and acts as neither a lock nor a brake. If your application requires position holding without live pressure, an external rod lock or a pilot-operated check valve is required.
Quick checklist
This 20 mm bore double-acting cylinder provides 157.1 N push and 131.9 N pull at 0.5 MPa, and 219.9 N push at 0.7 MPa. The theoretical maximum push force is 32 kgf at 1.0 MPa. Operating pressure ranges from 0.15-1.0 MPa, with a speed of 30-500 mm/s.
No, this specific SKU is built without a piston magnet, so it cannot trigger AirTAC reed or electronic switches. You must specify the -S option code to add a magnet for position sensing. Additionally, end-stop deceleration relies on a fixed NBR bumper, not an adjustable air cushion.
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