The AirTAC AirTAC SDA25X40SB Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm bore and 40mm 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 SDA25X40SB 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 short unit, drastically reducing axial mounting depth compared to conventional round-body designs. This space efficiency makes it ideal for machinery where footprint constraints are critical.
This specific configuration includes a built-in piston magnet (S) for direct mounting of AirTAC reed or electronic switches along the body grooves, and a male-thread piston rod end (B) sized at M8x1.25 for secure mechanical load coupling. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable cushion, meaning external shock absorbers should be added for high-velocity operations.
| Model | AirTAC SDA25X40SB Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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. |
| ×40 | 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 precise lateral pressure on printed circuit boards during conveyor transfer, utilizing the 245.4 N push force to maintain alignment without damaging delicate fiberglass substrates.
Drives a short mechanical arm to tuck minor flaps on packaging lines, where the 40mm stroke and space-saving riveted body fit neatly between adjacent conveyor belts.
Acts as a rugged end-stop in sheet metal feeding systems, using the male M8x1.25 rod thread to securely mount a wear pad that registers steel blanks for press operations.
Selecting this 25mm bore provides a practical middle ground: stepping down to the SDA20 yields 157.1 N push at 0.5 MPa, while stepping up to the SDA32 provides 402.1 N. At 0.5 MPa, this model offers a safe working load of roughly 147 N (about 60% of its rated push) and can vertically lift approximately 12.5 kg with a 2:1 safety margin. Keep in mind that a standard compact cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates near the stroke end rather than locking the load; utilize an external rod lock or pilot-operated check valve if position holding is required.
When ordering, confirm the essential attributes: 25mm bore, 40mm stroke, M5x0.8 port, the integrated magnet for sensing, and the male M8x1.25 rod thread.
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. Its theoretical maximum push force is 50 kgf at 1.0 MPa, with an operating pressure range of 0.15-1.0 MPa.
It relies on a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion or a locking brake. For position feedback, the built-in magnet works with AirTAC reed or electronic switches mounted in the body grooves.
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