The AirTAC AirTAC SDA20X25S 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 SDA20X25S is a double-acting single-rod compact cylinder engineered for tight axial spaces. It delivers 157.1 N of push force and 131.9 N of pull force at 0.5 MPa, operating via an M5x0.8 port. Its short riveted body minimizes mounting depth where a standard round-body unit would protrude too far into the machine envelope.
Equipped with a built-in piston magnet (-S), this unit supports AirTAC reed or electronic switches along the body grooves for precise position detection. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be specified for high-energy cycling.
| Model | AirTAC SDA20X25S 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).
Actuates a cutting head or clamping fence in compact electronics routing equipment, utilizing the 25mm stroke and 157.1 N force to secure small panels during milling.
Provides the precise 25mm downward stroke to press heating dies against blister card stock, fitting easily into narrow packaging machine frames.
Drives a lightweight routing flap on a package handling line, where the 8 kg vertical lift capacity and integrated magnet allow reliable tracking of small parcel traffic.
When sizing this 20mm bore, stepping down to the SDA16 yields 100.5 N push at 0.5 MPa, while stepping up to the SDA25 provides 245.4 N. For the current bore, the safe working load is approximately 94 N (about 60% of the 157.1 N figure), translating to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. To finalize your order, confirm the 20mm bore, 25mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the required sensor magnet.
Note that a plain compact cylinder does not hold its load if air pressure drops or the valve is centered; the piston will drift, and the fixed bumper only decelerates near stroke end rather than locking the rod. If your application requires position holding without live pressure, integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder provides 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 0.15-1.0 MPa at speeds of 30-500 mm/s.
No adjustable air cushion is included; the cylinder uses a fixed NBR bumper at each end to decelerate the stroke. Additionally, it will not hold a load if air is lost, as the bumper is not a brake. For load holding, you need an external rod lock or pilot-operated check valve.
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