The AirTAC AirTAC SDA20X120B 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 SDA20X120B is a double-acting, single-rod compact cylinder engineered for tight axial footprints. A riveted unibody design drastically reduces mounting depth compared to conventional round-body units, yielding a theoretical push force of 157.1 N at 0.5 MPa. This specific configuration includes a male M6x1.0 threaded piston rod end for secure mechanical load coupling.
Because the 120 mm stroke exceeds the 100 mm standard maximum for this 20 mm bore, this unit is classified as a non-standard, made-to-order item. End-of-travel deceleration relies strictly on fixed NBR bumpers rather than adjustable air cushions. Operating speeds span 30-500 mm/s, and since this SKU lacks the -S magnet suffix, it cannot directly host reed or electronic switches.
| Model | AirTAC SDA20X120B 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 light cardboard cartons on a logistics distribution line using 157.1 N of extend force, fitting neatly into narrow conveyor frame gaps.
Drives a delicate pick-and-place head through a 120 mm travel path to seat electronic connectors, relying on the rigid male M6 rod end for precise alignment.
Adjusts the position of a packaging web guide arm, where the compact body length prevents interference with adjacent wrapping machinery.
When sizing this actuator, compare its 157.1 N push at 0.5 MPa against adjacent bores: stepping down to the SDA16 provides 100.5 N, while moving up to the SDA25 yields 245.4 N. Factoring a 2:1 safety margin, the 20 mm bore achieves a safe working load around 94 N, making it suitable for vertically lifting roughly 8 kg. To finalize your order, confirm the 20 mm bore, 120 mm non-standard stroke, M5x0.8 port, and the male M6x1.0 rod thread.
Keep in mind that a standard compact cylinder drifts if air pressure drops or the valve is centered, as the fixed bumper only slows the piston near stroke end and acts as neither a lock nor a brake. To suspend a load safely without live pressure, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This 20 mm bore double-acting cylinder generates a push force of 157.1 N and a pull force of 131.9 N at 0.5 MPa. At 0.7 MPa, the push increases to 219.9 N. The theoretical maximum push is 32 kgf at the 1.0 MPa operating pressure limit.
This specific SKU lacks a piston magnet, so it cannot host reed or electronic switches; you would need the -S variant for position sensing. Deceleration is handled by fixed NBR bumpers at each end, which are not adjustable air cushions, so external shock absorbers are advised for high-speed operations.
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