The AirTAC AirTAC SDA20X50S Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 50mm 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 SDA20X50S 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. Its riveted assembly significantly reduces axial mounting depth compared to round-body alternatives, making it highly effective for machinery with tight spatial constraints. The hard-anodized 20 mm bore operates efficiently at speeds between 30-500 mm/s.
This specific configuration includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches along the body grooves. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach or utilize external shock absorbers for high-energy loads. The 8 mm piston rod features a female M4x0.7 thread, and the air supply connects via an M5x0.8 port.
| Model | AirTAC SDA20X50S Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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. |
| ×50 | 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).
Actuates a routing tool guide with precise 50 mm travel, utilizing the 157.1 N push force to maintain positioning on an electronics assembly line.
Drives a short folding arm on a packaging conveyor, where the compact riveted body minimizes axial footprint and the integrated magnet confirms flap position via a reed or electronic switch.
Moves a dispensing head vertically to lift roughly 8 kg of media with a 2:1 safety margin, relying on the 8 mm rod to execute 50 mm strokes at controlled speeds.
When sizing this actuator, consider stepping down to the SDA16, which provides 100.5 N of push force at 0.5 MPa, or moving up to the SDA25, which yields 245.4 N at the same pressure. For the SDA20X50S, the safe working load is approximately 94 N (about 60% of the 157.1 N figure), allowing for a vertical lift of roughly 8 kg with a 2:1 safety margin. Ensure your ordering essentials are correct: 20 mm bore, 50 mm stroke, M5x0.8 port, female rod thread, and the integrated sensor magnet.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure is lost or the valve is centered; the piston will drift, and the fixed NBR bumper only decelerates the stroke near its end. If your application requires position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 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. It operates within a pressure range of 0.15-1.0 MPa, handles temperatures from -20 to +70 C, and runs at speeds of 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the stroke. It is not an adjustable cushion, nor is it a locking brake. For high-speed or high-energy loads, you should add an external shock absorber or reduce the approach speed.
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