The AirTAC AirTAC SDA20X15SN Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 15mm 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 SDA20X15SN is a double-acting, single-rod compact cylinder engineered to deliver 157.1 N of push force at 0.5 MPa. Its riveted assembly drastically reduces axial mounting depth compared to traditional round-body units, making it ideal for machinery where space is strictly limited. The bore is hard-anodized and utilizes a two-way piston seal for reliable pneumatic performance.
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 high-speed approaches may require external shock absorption. The unit operates at speeds between 30-500 mm/s and features an 8 mm piston rod with an M5x0.8 air port.
| Model | AirTAC SDA20X15SN Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 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. |
| ×15 | 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).
Provides a short 15 mm ejection stroke to push singulated circuit boards from a routing fixture, utilizing the 157.1 N force to clear the tooling area without consuming excessive vertical envelope.
Actuates a lightweight flap to redirect small parcels on a high-speed logistics belt, where the compact riveted body fits neatly within the conveyor side-frame clearance.
Drives a 15 mm linear shift on an automated analyzer carousel, with the built-in magnet triggering a solid-state switch to confirm precise tray positioning.
When sizing this 20 mm bore actuator, compare its 157.1 N push at 0.5 MPa against adjacent options: stepping down to the SDA16 yields 100.5 N, while stepping up to the SDA25 provides 245.4 N. Based on the 0.5 MPa output, the safe working load is approximately 94 N (60% capacity), translating to a vertical lift capability of roughly 8 kg with a 2:1 safety margin. Ensure your ordering essentials cover the 20 mm bore, 15 mm stroke, M5x0.8 port, female rod thread, and the required magnetic sensor option.
Keep in mind that a standard double-acting cylinder like this will not hold a load if air pressure is lost or the directional valve is centered; the piston will drift, as the fixed NBR bumper only decelerates the stroke near its end points and acts as neither a lock nor a brake. For applications requiring suspended load security, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This 20 mm bore cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa, increasing to 219.9 N push and 184.7 N pull at 0.7 MPa. The theoretical maximum push is 32 kgf at 1.0 MPa, which is the maximum operating pressure.
No, the SDA series uses a fixed NBR bumper at each end to decelerate the piston, rather than a field-adjustable air cushion. For high kinetic energy loads, you should add an external shock absorber or reduce the approach speed.
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