The AirTAC AirTAC SDA20X20SB Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 20mm 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 SDA20X20SB is a double-acting, single-rod compact cylinder engineered for tight axial spaces. A riveted assembly joining the barrel, rear cover, and piston yields a very short overall length, saving valuable mounting depth where a conventional round-body unit cannot fit. Operating at 0.15-1.0 MPa, it provides 157.1 N of push force and 131.9 N of pull force at 0.5 MPa.
This specific configuration includes an S option for a built-in piston magnet, enabling position sensing via an AirTAC reed or electronic switch fitted into the body grooves. The B option equips the 8 mm rod with a male M6x1.0 thread end for direct load coupling. End-stopping relies on a fixed NBR bumper that decelerates the piston near stroke limits rather than an adjustable air cushion.
| Model | AirTAC SDA20X20SB Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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. |
| ×20 | 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 the tooling head on an electronics assembly line, utilizing the 20 mm stroke and 157.1 N push force to separate printed circuit boards with precise, short movements.
Closes the heat seal jaw on a pharmaceutical packaging machine, where the short riveted body minimizes axial footprint and the male M6 thread secures the heated platen.
Indexes a fluid dispensing valve over microplate wells, relying on the built-in magnet and an electronic switch to confirm the 20 mm extension before ejecting reagents.
When sizing this 20 mm bore actuator, evaluate your force needs bidirectionally: stepping down to the SDA16 reduces the 0.5 MPa push capacity to 100.5 N, while stepping up to the SDA25 increases it to 245.4 N. For the SDA20X20SB, the computed safe working load is approximately 94 N (about 60% of the 157.1 N figure), translating to a vertical lift capability of roughly 8 kg with a 2:1 safety margin. To order, confirm the 20 mm bore, 20 mm stroke, M5x0.8 port, male M6x1.0 rod thread, and the required magnetic sensor.
Note that a standard compact cylinder drifts when air pressure is lost or the directional valve is centered. The fixed NBR bumper only decelerates the piston near the stroke end and does not function as a locking brake. If your application must hold a vertical load without live pressure, integrate an external rod lock or a pilot-operated check valve into the pneumatic circuit.
Quick checklist
This 20 mm bore double-acting cylinder generates 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 speeds of 30-500 mm/s, and functions in temperatures from -20 to +70 C.
It uses a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion; for high-energy cycles, slow the approach or add external shock absorbers. The SB option provides a male M6x1.0 piston rod thread and a built-in magnet compatible with AirTAC reed or electronic switches mounted in the body grooves.
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