The AirTAC AirTAC SDA20X55 Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 55mm 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 SDA20X55 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 merges the barrel, rear cover, piston and rod into a highly unified unit, drastically reducing axial mounting depth where a conventional round-body actuator would protrude too far into your machine envelope.
This specific configuration features a 20 mm bore, a 55 mm stroke, and an 8 mm piston rod. 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. This SKU omits the piston magnet, so position sensing via the body grooves is not supported without selecting the -S variant.
| Model | AirTAC SDA20X55 Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 55 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. |
| ×55 | 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 the 157.1 N push at 0.5 MPa needed to actuate the cutting head feed on an electronic PCB depaneling machine, where the short riveted body keeps the footprint minimal.
Drives the upper platen of a small blister packaging press, relying on the fixed NBR bumper to soften the impact at the 55 mm stroke end during rapid cycling.
Actuates a lightweight diverter gate on a parcel sorting line, easily handling the 8 kg vertical lift capacity to pivot the mechanism reliably.
When sizing this actuator, consider stepping down to the SDA16 which provides 100.5 N of push at 0.5 MPa for lighter duties, or moving up to the SDA25 which yields 245.4 N if your application demands greater thrust. For the SDA20X55, the safe working load is approximately 94 N (about 60% of the 157.1 N figure), translating to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin.
Confirm your ordering essentials: 20 mm bore, 55 mm stroke, M5x0.8 port, female M4x0.7 rod thread (default), and no sensor magnet. Note that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates the stroke end rather than locking the load; holding a suspended mass requires an external rod lock or pilot-operated check valve.
Quick checklist
The SDA20X55 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. Operating pressure ranges from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa and a speed range of 30-500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches in the body grooves. You must select the -S option (e.g. SDA20X55S) to enable position sensing.
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