The AirTAC AirTAC SDA12X40SN 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 SDA12X40SN is a double-acting, single-rod compact cylinder engineered for tight machinery footprints. Utilizing a riveted body assembly, it drastically reduces axial mounting depth compared to conventional round-body units, yielding a theoretical push force of 56.5 N and pull force of 42.4 N at 0.5 MPa. The bore is hard-anodized, and the piston relies on a two-way seal to maintain efficient operation across a 30-500 mm/s speed range.
This specific configuration includes a built-in piston magnet (denoted by the S code) for direct compatibility with AirTAC reed or electronic switches housed in the body grooves. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach or utilize external shock absorbers for high-energy loads. The unit features a 6 mm piston rod and an M5x0.8 air port.
| Model | AirTAC SDA12X40SN 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).
Drives delicate test probes onto printed circuit boards, utilizing the 56.5 N push force to ensure reliable electrical contact without damaging the substrate.
Moves micro-fluidic dispenser nozzles into exact alignment over assay trays, benefiting from the minimal axial length to fit inside crowded biological analysis enclosures.
Ejects lightweight plastic parts from semiconductor molding tools, where the 6 mm rod and compact footprint integrate seamlessly into tight die-clearance zones.
When sizing this 12 mm bore actuator, evaluate your force margins carefully. At 0.5 MPa, this model provides 56.5 N of push force, meaning a safe working load is roughly 34 N (about 60% capacity), or a vertical lift of approximately 2.9 kg with a 2:1 safety margin. If your application demands greater thrust, stepping up to the SDA16 increases output to 100.5 N at 0.5 MPa. To confirm your ordering essentials for this build: specify the 12 mm bore, 40 mm stroke, M5x0.8 port, female rod-end thread (M3x0.5), and the required magnetic sensor option.
Keep in mind that a standard double-acting cylinder like this will not hold a load if air pressure drops or the directional valve is centered; the piston will drift, as the fixed NBR bumper only decelerates the stroke near its ends rather than locking the rod. For vertical or suspended loads requiring fail-safe holding, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This 12 mm bore cylinder generates 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 and pull to 59.4 N. The theoretical maximum push is 12 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds from 30 to 500 mm/s.
No, the piston will drift if air is lost or the valve is centered. The fixed NBR bumpers at each end are designed solely to decelerate the stroke at its limits, not to act as a mechanical lock or brake. To maintain position on a vertical load, you must install an external rod lock or a pilot-operated check valve.
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