The AirTAC AirTAC SDA25X20SBH Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm bore and 20mm 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 SDA25X20SBH is a double-acting, single-rod compact cylinder engineered for tight axial spaces. It delivers 245.4 N of push force and 206.2 N of pull force at 0.5 MPa, utilizing a hard-anodized bore and a two-way piston seal. This specific configuration includes a built-in piston magnet (-S), a male M8x1.25 piston rod thread (-B), and fluororubber (FKM) seals (-H) for enhanced thermal and oil resistance.
Its riveted body design significantly reduces overall mounting depth compared to conventional round-body units. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable cushion, so external shock absorbers should be added for high-energy cycles. The integrated magnet allows positioning feedback via AirTAC reed or electronic switches mounted in the body grooves.
| Model | AirTAC SDA25X20SBH Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 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. |
| ×20 | 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).
Secures aluminum workpieces in a CNC machining center using the 245.4 N extend force, with FKM seals resisting coolant spray and cutting oils.
Drives a 20 mm heat-sealing head against plastic packaging films, where the short body depth minimizes interference with moving conveyor components.
Extends a male M8x1.25 threaded pin to locate circuit boards during wave soldering, using the magnetic sensor for precise stroke confirmation.
When sizing this 25 mm bore unit, stepping down to the SDA20 yields 157.1 N of push force at 0.5 MPa, while stepping up to the SDA32 provides 402.1 N. For this 20 mm stroke configuration, the safe working load is approximately 147 N (about 60% of the 0.5 MPa rating), translating to a vertical lift capacity of roughly 12.5 kg with a 2:1 safety margin. Confirm your ordering essentials: 25 mm bore, 20 mm stroke, M5x0.8 port, male M8x1.25 rod, FKM seals, and a piston magnet.
Keep in mind that a standard compact cylinder cannot hold a load if air pressure is lost or the directional valve is centered; the piston will drift, and the fixed bumper only decelerates near the stroke end rather than locking the rod. If your application requires static holding, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 25 mm bore double-acting cylinder generates 245.4 N push and 206.2 N pull at 0.5 MPa, and 343.6 N push at 0.7 MPa. The theoretical maximum push force is 50 kgf at the 1.0 MPa operating pressure limit.
It relies on a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion. The -S option includes a piston magnet for use with AirTAC reed or electronic switches, and the -B option provides a male M8x1.25 rod end.
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