The AirTAC AirTAC SDA25X55B Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm 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 SDA25X55B is a double-acting, single-rod compact cylinder engineered to deliver 245.4 N of push force and 206.2 N of pull force at 0.5 MPa. Its riveted body assembly significantly reduces axial mounting depth, making it highly effective for machinery where a standard round-body actuator would occupy too much space. The unit operates at speeds between 30-500 mm/s.
This specific SKU is configured with a male M8x1.25 piston rod thread for secure mechanical load coupling, paired with an M5x0.8 air port. It relies on a fixed NBR bumper at each end to decelerate the stroke, rather than an adjustable air cushion. Because this model lacks the -S magnet option, it cannot directly host AirTAC reed or electronic switches.
| Model | AirTAC SDA25X55B Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 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 | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 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. |
|---|---|
| 25 | 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).
Actuates a routing flap on a logistics sorting line, utilizing the 55 mm stroke and 245.4 N push force to redirect parcels weighing up to 12.5 kg without extending the machine footprint.
Drives a folding arm on an automated packaging machine, where the short riveted body saves axial depth and the male M8x1.25 rod thread securely attaches the folding bracket.
Pushes machined parts out of a CNC fixture, relying on the fixed NBR bumper to absorb the end-stop impact within the compact assembly cell.
When sizing this 25 mm bore actuator, stepping down to an SDA20 reduces the 0.5 MPa push capacity to 157.1 N, while stepping up to an SDA32 increases it to 402.1 N. Based on the 245.4 N output at 0.5 MPa, the safe working load is approximately 147 N (around 60% capacity), translating to a vertical lift capability of roughly 12.5 kg with a 2:1 safety margin. Keep in mind that a plain compact cylinder drifts when air pressure is lost or the valve is centered; the fixed NBR bumper only decelerates near the stroke end and does not function as a locking brake. If your process demands strict position holding, an external rod lock or pilot-operated check valve is required. To order, confirm the 25 mm bore, 55 mm stroke, M5x0.8 port, male M8x1.25 rod thread, and no magnet.
Quick checklist
This 25 mm bore double-acting cylinder provides 245.4 N push and 206.2 N pull at 0.5 MPa, 343.6 N push and 288.6 N pull at 0.7 MPa, with a theoretical maximum push of 50 kgf at 1.0 MPa. It operates within a pressure range of 0.15-1.0 MPa, a proof pressure of 1.5 MPa, and speeds of 30-500 mm/s.
No, this specific SKU does not include the -S piston magnet, so it cannot host AirTAC reed or electronic switches. You would need the -S variant for sensing. Additionally, it uses a fixed NBR bumper rather than an adjustable air cushion, so external shock absorbers may be needed for high-energy loads.
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