The AirTAC AirTAC SDA20X25B Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 25mm 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 SDA20X25B is a double-acting, single-rod compact cylinder engineered to deliver 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and rod into an ultra-short unit, drastically reducing axial mounting depth where a conventional round-body actuator cannot fit. The bore is hard-anodized and utilizes a two-way piston seal for reliable performance across a 30-500 mm/s speed range.
This specific SKU includes a male M6x1.0 piston rod thread for direct load coupling, replacing the standard female M4x0.7. It operates on an M5x0.8 port and relies on a fixed NBR bumper at each end to decelerate the stroke end. Because this configuration lacks the -S magnet option, it cannot support magnetic reed or electronic switches. The fixed bumper is not an adjustable air cushion, so external shock absorbers should be added for high-energy cycling.
| Model | AirTAC SDA20X25B Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 90 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 | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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. |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 157.1 N push at 0.5 MPa needed to actuate the Z-axis cutting head on a printed circuit board depaneling machine, utilizing the short 25 mm stroke for rapid positioning.
Drives the folding mechanism on a small packaging line, where the male M6x1.0 rod end secures the folding arm and the compact body conserves vertical space.
Actuates a pipetting or fluid dispensing head in laboratory automation, moving 8 kg of vertical mass safely with a 2:1 margin while avoiding side loads on the 8 mm rod.
When sizing this 20 mm bore actuator, evaluate your force requirements carefully. Stepping down to the SDA16 provides 100.5 N of push at 0.5 MPa, while moving up to the SDA25 yields 245.4 N. For the SDA20X25B, the 157.1 N output translates to a safe working load of roughly 94 N (about 60% of capacity) and a vertical lift capability of approximately 8 kg with a 2:1 safety margin. Ensure your specifications confirm the 20 mm bore, 25 mm stroke, M5x0.8 port, and the male M6x1.0 rod thread denoted by the B option. Note that a plain cylinder like this does not hold its load if air pressure is lost or the valve is centered; the piston will drift, and the bumper only decelerates near the stroke end. To maintain position, an external rod lock or pilot-operated check valve is required.
Quick checklist
This double-acting cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa, and 219.9 N push at 0.7 MPa. The theoretical maximum push is 32 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and functions at speeds of 30-500 mm/s.
No. It uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. Additionally, because it lacks the -S option, there is no piston magnet and it cannot accept reed or electronic switches. The -B option denotes a male M6x1.0 rod thread.
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