The AirTAC AirTAC SDA25X20BH 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 SDA25X20BH is a double-acting single-rod compact cylinder engineered for tight axial spaces. It delivers a push force of 245.4 N and a pull force of 206.2 N at 0.5 MPa, yielding a safe working load of roughly 147 N or a 12.5 kg vertical lift with a 2:1 margin. The riveted body design drastically reduces mounting depth compared to round-body units, making it highly effective for shrinking machine footprints.
This specific configuration includes a male M8x1.25 threaded piston rod for secure mechanical coupling, paired with fluororubber (FKM) seals for enhanced thermal and oil resistance. The bore features a hard-anodized inner wall and a two-way piston seal. End-stopping relies on a fixed NBR bumper that decelerates the piston near stroke limits; it is not an adjustable air cushion, so high-speed applications should incorporate an external shock absorber.
| Model | AirTAC SDA25X20BH 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).
Provides the 245.4 N push stroke required to fold and secure corrugated cardboard flaps on high-speed packaging lines where axial depth is restricted.
Actuates a routing flap to push parcels between conveyor belts, utilizing the 20 mm stroke and FKM seals to withstand dusty logistics hub environments.
Secures delicate electronic panels during drilling or routing, using the male M8x1.25 rod end to attach a custom soft-jaw fixture without inducing side loads.
When sizing this unit, consider stepping down to the SDA20, which provides 157.1 N of push force at 0.5 MPa, or moving up to the SDA32, which offers 402.1 N at the same pressure. The SDA25X20BH operates at 30-500 mm/s and utilizes an M5x0.8 port. To finalize your order, confirm the 25 mm bore, 20 mm stroke, male M8x1.25 rod thread, and FKM seal option. Note that this SKU lacks a piston magnet, so position sensing is not supported without switching to an -S variant. Furthermore, a standard compact cylinder cannot hold a load if air pressure drops or the valve is centered—the piston will drift, as the fixed bumper only decelerates near the stroke end and does not act as a lock or brake. For suspended loads, integrate an external rod lock or pilot-operated check valve.
Quick checklist
At 0.5 MPa, the push force is 245.4 N and the pull force is 206.2 N. At 0.7 MPa, the push force is 343.6 N. The theoretical maximum push force is 50 kgf at the 1.0 MPa operating pressure limit.
It uses a fixed NBR bumper at each end to decelerate the piston, which is not a field-adjustable air cushion. If the air supply is lost, the cylinder cannot hold its load and will drift; a pilot-operated check valve or external rod lock is required for position holding.
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