The AirTAC AirTAC SDA20X50B 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 SDA20X50B is a double-acting single-rod compact cylinder engineered for tight machinery footprints. Its riveted assembly reduces overall axial length compared to round-body units, yielding a theoretical push force of 157.1 N at 0.5 MPa (219.9 N at 0.7 MPa). This specific SKU features a male M6x1.0 piston rod thread for direct load coupling and uses an M5x0.8 air port.
Instead of an adjustable air cushion, the bore relies on a fixed NBR bumper at each end to decelerate the stroke. Because this unit lacks the -S magnet option, it cannot host reed or electronic switches. With a safe working load around 94 N (roughly 60% of the 0.5 MPa push figure), it suits light-duty positioning tasks within its 30-500 mm/s speed range.
| Model | AirTAC SDA20X50B 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 the tooling head on a depaneling machine, using the 50 mm stroke to plunge and route circuit boards with precise 157.1 N of extend force.
Pushes small cardboard cartons off a main conveyor belt at high speed, where the short 20 mm bore body saves valuable mounting depth along the frame.
Moves the upper heated platen down onto blister packaging, relying on the fixed NBR bumper to absorb the impact at the bottom of the stroke.
When sizing this 20 mm bore, stepping down to the SDA16 yields 100.5 N of push at 0.5 MPa, while stepping up to the SDA25 provides 245.4 N. This SDA20X50B configuration includes a 50 mm stroke, M5x0.8 porting, and a male M6x1.0 rod end (replacing the default female M4x0.7). Keep in mind that a standard compact cylinder drifts if air pressure drops or the valve centers; the fixed bumper only slows travel near the end caps. To suspend a load securely without live pressure, integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 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, push increases to 219.9 N. The theoretical maximum push is 32 kgf at 1.0 MPa, with an operating pressure range of 0.15-1.0 MPa.
No, this specific SKU does not include the -S magnet option, so it cannot host reed or electronic switches. You would need the -S variant for position sensing. Additionally, it uses a fixed NBR bumper rather than an adjustable air cushion, so external shock absorbers are recommended for high-energy loads.
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