The AirTAC AirTAC SDA50X20B Compact Cylinder | 50mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø50mm bore and 20mm stroke, PT1/4 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA50X20B is a double-acting, single-rod compact cylinder engineered to deliver 981.7 N of push force at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and rod into an exceptionally short axial footprint, conserving valuable machine space where a conventional round-body unit would protrude. The internal bore is hard-anodized, and the piston relies on a two-way seal for efficient actuation.
This specific SKU features a male M18x1.5 threaded piston rod for robust mechanical coupling to your load. Because it lacks the -S option, there is no piston magnet, so it cannot host magnetic position sensing. End-stopping is handled by a fixed NBR bumper that decelerates the piston near stroke termination rather than acting as a lock or brake. Operating speed spans 30-500 mm/s.
| Model | AirTAC SDA50X20B Compact Cylinder | 50mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 120 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | 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).
Drives short-stroke ejection pins in plastic injection molding machines, utilizing the 981.7 N push force to reliably free finished parts from tight mold cavities.
Folds heavy corrugated cardboard flaps on automated packaging lines, where the male M18x1.5 rod threads securely mount custom folding arms.
Actuates heavy-duty routing gates on conveyor systems to redirect loaded pallets, benefiting from the short riveted body to fit within tight conveyor frame clearances.
Selecting this 50 mm bore yields a safe working load of roughly 589 N (about 60% of the 981.7 N push at 0.5 MPa), translating to a vertical lift capacity of approximately 50 kg with a 2:1 safety margin. If your application requires less force, the SDA40 provides 628.3 N at 0.5 MPa; stepping up to the SDA63 offers 1558.6 N. When ordering, confirm the 20 mm stroke, PT1/4 port, male M18x1.5 rod end, and the absence of a magnet.
Keep in mind that a standard compact cylinder drifts when air pressure is lost or the valve is centered. The fixed NBR bumper only absorbs impact energy near the stroke ends and does not function as a locking device. To suspend a load safely without live pressure, integrate an external rod lock or a pilot-operated check valve into your circuit.
Quick checklist
This 50 mm bore model features a PT1/4 air port. It generates 981.7 N of push and 824.7 N of pull at 0.5 MPa. At 0.7 MPa, push increases to 1374.4 N and pull to 1154.5 N. The theoretical maximum push force is 200 kgf at 1.0 MPa.
No, this specific SKU lacks the -S piston magnet and therefore cannot support reed or electronic switches. Additionally, it uses a fixed NBR bumper to decelerate at the stroke ends, which is not an adjustable air cushion, so external shock absorbers may be needed for high-speed cycling.
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