The AirTAC AirTAC SDA12X40B Compact Cylinder | 12mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø12mm 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 SDA12X40B is a double-acting, single-rod compact cylinder engineered for tight axial spaces. It generates 56.5 N of push force and 42.4 N of pull force at 0.5 MPa, making it suitable for light-duty positioning. The riveted unibody design significantly reduces overall length compared to conventional round-body cylinders, saving valuable mounting depth in dense machinery.
This specific configuration features a male M5x0.8 threaded piston rod for direct load attachment. The bore is hard-anodized for longevity, and deceleration at the stroke ends is handled by a fixed NBR bumper rather than an adjustable cushion. Note that this SKU lacks a piston magnet, so position sensing is not supported without upgrading to an -S variant.
| Model | AirTAC SDA12X40B Compact Cylinder | 12mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø12 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod end thread | M3×0.5 female / M5×0.8 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 50 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 | 57 N | 42 N |
| 0.7 MPa | 79 N | — |
| Max (@1.0 MPa) | 12 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. |
|---|---|
| 12 | 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).
Positions delicate printed circuit boards on an SMT pick-and-place line using the male M5x0.8 rod end, fitting easily into narrow conveyor gaps.
Drives a micro-valve for chemical reagent dispensing where the 56.5 N force is sufficient and the compact body limits overall instrument footprint.
Pushes lightweight plastic moulded components out of a testing fixture, relying on the fixed NBR bumper to absorb the 40 mm stroke impact.
When sizing this 12 mm bore actuator, consider stepping up to the SDA16, which provides 100.5 N of push at 0.5 MPa if your application exceeds the safe working load of roughly 34 N (about 60% of the 56.5 N capacity). For vertical lifts, this model can safely handle approximately 2.9 kg with a 2:1 safety margin. As the smallest available bore in the series, there is no smaller standard SDA option. To order, confirm the 40 mm stroke, M5x0.8 port, male M5x0.8 rod thread, and the absence of a sensor magnet.
Keep in mind that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered. The fixed NBR bumper only decelerates the piston near the end of travel and does not function as a locking brake. If your setup must hold a load vertically without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 12 mm bore cylinder delivers a push force of 56.5 N and a pull force of 42.4 N at 0.5 MPa. At 0.7 MPa, the push increases to 79.2 N. The theoretical maximum push force is 12 kgf at the 1.0 MPa pressure limit.
No, this specific SKU does not include a piston magnet. To use AirTAC reed or electronic switches in the body grooves, you must select the SDA12X40BS variant which includes the built-in magnet.
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