The AirTAC AirTAC SDA25X20S 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 SDA25X20S 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 assembly merges the barrel, rear cover, piston, and rod into a highly shortened unit, drastically reducing axial mounting depth where a conventional round-body actuator would be too long. The internal bore is hard-anodized, and the piston relies on a two-way seal for efficient operation.
This specific unit includes the built-in piston magnet (-S), allowing you to mount AirTAC reed or electronic switches directly into the sensor grooves around the body for precise position detection. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning high-speed approaches may require external shock absorption. With a 10 mm piston rod and an M5x0.8 port, it achieves a safe working load of roughly 147 N (about 60% of the 0.5 MPa push figure) and a vertical lift capacity near 12.5 kg with a 2:1 safety margin.
| Model | AirTAC SDA25X20S 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).
Uses the 245.4 N extend force to nudge printed circuit boards into alignment on an SMT pick-and-place conveyor before component placement.
Deploys the 20 mm stroke to tuck minor flaps on small retail packaging boxes ahead of the sealing head, fitting neatly into tight machine frames.
Moves a fluid dispensing nozzle into exact contact with microplate wells, leveraging the magnetic sensor feedback for repeatable dosing cycles.
When sizing this actuator, evaluate your force requirements bidirectionally: stepping down to the SDA20 reduces the 0.5 MPa push capacity to 157.1 N, while stepping up to the SDA32 increases it to 402.1 N. For this 25 mm bore, the standard stroke limit extends to 130 mm, so a 20 mm stroke is well within the compact operating range. To finalize your order, confirm the 25 mm bore, 20 mm stroke, M5x0.8 port, the required -S magnet for sensing, and the female M5x0.8 rod-end thread.
Keep in mind that a standard compact cylinder cannot hold a load if air pressure drops or the directional valve is centered; the piston will drift, and the fixed NBR bumper only decelerates the stroke end without acting as a mechanical lock. If your application demands fail-safe position holding, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This double-acting cylinder generates 245.4 N push and 206.2 N pull at 0.5 MPa, and 343.6 N push at 0.7 MPa. The theoretical maximum push force is 50 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and runs at speeds from 30 to 500 mm/s.
No adjustable air cushion is available; it uses a fixed NBR bumper at each end to absorb the end stop, so you should add an external shock absorber for high-energy cycles. Additionally, it will not hold a load unpowered—the piston drifts if air is lost, requiring an external rod lock or pilot-operated check valve for secure positioning.
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