The AirTAC AirTAC SDA25X20B Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm bore and 20mm 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 SDA25X20B 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 unit would simply not fit. This specific SKU is configured with a male M8x1.25 piston rod thread for robust mechanical coupling to your load.
The bore features a hard-anodized inner wall and a two-way piston seal operating at speeds from 30-500 mm/s. End-of-stroke deceleration is handled strictly by a fixed NBR bumper rather than an adjustable air cushion. This particular unit lacks a piston magnet, meaning it cannot support position sensing out of the box; adding an -S variant is required to utilize the body's magnetic switch grooves.
| Model | AirTAC SDA25X20B Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 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. |
| ×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).
Utilizes the 20 mm stroke and male M8x1.25 rod end to precisely nudge printed circuit boards into alignment on an SMT pick-and-place conveyor line.
Employs the 245.4 N push force at 0.5 MPa to swiftly tuck minor carton flaps prior to tape sealing, fitting easily into tight packaging machine frames.
Pushes small metal pins out of a progressive die station, relying on the compact riveted body to save axial space in a densely built press tool.
When sizing this 25 mm bore model, stepping down to the SDA20 reduces the 0.5 MPa push output to 157.1 N, while stepping up to the SDA32 increases it substantially to 402.1 N. For this SDA25X20B configuration, a safe working load is approximately 147 N (about 60% of the 245.4 N capacity), which translates to a vertical lift capability of roughly 12.5 kg when applying a 2:1 safety margin. Ensure you specify the 20 mm stroke, M5x0.8 port, and the male M8x1.25 rod thread when ordering.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure is lost or the directional valve is centered. The piston will drift under load, as the fixed NBR bumper only decelerates the stroke near the end caps and does not function as a mechanical lock. If your application demands position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 25 mm bore double-acting cylinder generates 245.4 N push and 206.2 N pull at 0.5 MPa, increasing to 343.6 N push and 288.6 N pull at 0.7 MPa. The theoretical maximum push force is 50 kgf at 1.0 MPa. It operates within a pressure range of 0.15-1.0 MPa, handles speeds of 30-500 mm/s, and functions in temperatures from -20 to +70 C.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches. The body retains the standard sensor grooves, but you must specify the -S option (e.g., SDA25X20BS) to enable position sensing capabilities. Additionally, end-stop deceleration is provided by a fixed NBR bumper, not an adjustable air cushion.
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