The 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. 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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