The AirTAC AirTAC SDA20X120S Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 120mm 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 SDA20X120S is a double-acting single-rod compact cylinder engineered to deliver 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. Because the stroke of 120 mm exceeds the 100 mm standard maximum for this 20 mm bore, this unit is classified as a non-standard, made-to-order configuration. The short riveted body assembly significantly reduces axial mounting depth compared to round-body alternatives, conserving valuable machine footprint.
This specific model includes a built-in piston magnet (the S option) for direct compatibility with AirTAC reed or electronic switches fitted into the body grooves. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable cushion, meaning external shock absorbers should be specified for high-energy cycles. The 8 mm rod utilizes a female M4x0.7 thread, operating via an M5x0.8 port at speeds between 30 and 500 mm/s.
| Model | AirTAC SDA20X120S Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 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. |
| ×120 | 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 small cartons between adjacent sorting belts on a packaging line where the 157.1 N extend force is sufficient to redirect lightweight boxes.
Extracts printed circuit boards from test fixtures using the 120 mm travel distance, relying on the built-in magnet to confirm full retraction.
Moves fluid sample racks between analytical stations, taking advantage of the compact riveted body to fit within tight laboratory automation frames.
When sizing this actuator, evaluate your force requirements against the adjacent bores: the SDA16 yields 100.5 N of push at 0.5 MPa, whereas the SDA25 provides 245.4 N. The 20 mm bore here offers a calculated safe working load of roughly 94 N (about 60% of the 157.1 N capacity) and can vertically lift approximately 8 kg with a 2:1 safety margin. Keep in mind a standard SDA will not hold a load if air pressure drops or the valve centers; the piston drifts until the fixed bumper catches it, so add an external rod lock or pilot-operated check valve if position holding is critical. To order, confirm the 20 mm bore, 120 mm non-standard stroke, M5x0.8 port, female rod thread, and the required magnetic sensor option.
Quick checklist
At 0.5 MPa, this 20 mm bore cylinder provides 157.1 N of push force and 131.9 N of pull force. At 0.7 MPa, the push increases to 219.9 N and the pull to 184.7 N. The theoretical maximum push force is 32 kgf at 1.0 MPa.
No, the piston will drift if air is lost or the valve is centered. The fixed NBR bumper only decelerates the stroke near the end points; it does not function as a locking brake. For vertical load holding, you must install an external rod lock or a pilot-operated check valve.
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