The AirTAC AirTAC SDA25X40SN 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 SDA25X40SN is a double-acting, single-rod compact cylinder engineered with a 25 mm bore and 40 mm stroke. By utilizing a riveted assembly that merges the barrel, rear cover, piston, and rod, this unit achieves an exceptionally short axial profile, saving valuable mounting space in tight machinery footprints. It delivers a robust 245.4 N push force at 0.5 MPa, supported by a hard-anodized bore and a two-way piston seal for reliable pneumatic performance.
This specific configuration includes a built-in piston magnet (-S) for direct compatibility with AirTAC reed or electronic switches, fitting neatly into the body's magnetic grooves. End-of-stroke deceleration is handled by a fixed NBR bumper at each end, which absorbs impact energy but is not a field-adjustable air cushion. The 10 mm piston rod features a female M5x0.8 thread, and the body utilizes an M5x0.8 air port.
| Model | AirTAC SDA25X40SN 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 the precise 245.4 N push at 0.5 MPa needed to eject routed circuit boards from a fixture without stressing the substrate.
Cycles at 30-500 mm/s to tuck minor flaps on small packaging lines, where the short riveted body minimizes interference with passing conveyors.
Uses the integrated magnet with an electronic switch to confirm stroke position for diverting components into designated bins.
When sizing this model, evaluate your force requirements against adjacent bores: stepping down to the SDA20 yields 157.1 N push at 0.5 MPa, while stepping up to the SDA32 provides 402.1 N push at 0.5 MPa. A practical safe working load for this 25 mm bore is approximately 147 N (about 60% of the 245.4 N figure), translating to a vertical lift capacity of roughly 12.5 kg with a 2:1 safety margin. Keep in mind that a plain compact cylinder does not hold its position if air pressure is lost or the valve is centered; the piston will drift, and the fixed bumper only decelerates near the stroke end rather than locking the load. For applications requiring position holding without live pressure, an external rod lock or pilot-operated check valve is required. Confirm your ordering essentials: 25 mm bore, 40 mm stroke, M5x0.8 port, female rod thread, and the built-in magnet.
Quick checklist
This double-acting cylinder generates a push force of 245.4 N and a pull force of 206.2 N at 0.5 MPa. At 0.7 MPa, the push force is 343.6 N and pull is 288.6 N. The theoretical maximum push force is 50 kgf at 1.0 MPa. It operates within a pressure range of 0.15-1.0 MPa, a proof pressure of 1.5 MPa, and a speed range of 30-500 mm/s.
No. The cylinder uses a fixed NBR bumper at each end to decelerate the piston near the stroke extremes, which is not an adjustable air cushion. Additionally, it does not feature a locking mechanism; if air is lost, the piston will drift. For load holding, you must integrate an external rod lock or a pilot-operated check valve.
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