The AirTAC AirTAC SDA25X40BH 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 SDA25X40BH is a double-acting single-rod compact cylinder engineered with a 25 mm bore and 40 mm stroke. It generates 245.4 N of push force and 206.2 N of pull force at 0.5 MPa. This specific SKU includes a male M8x1.25 piston rod end for straightforward load coupling, alongside an FKM fluororubber seal variant that provides elevated thermal and oil resistance over the standard NBR rubber.
Its riveted body design integrates the barrel, rear cover, and piston to drastically reduce axial mounting depth, saving valuable machine footprint where a conventional round-body unit cannot fit. The bore is hard-anodized for longevity, and end-stroke deceleration is handled strictly by fixed NBR bumpers rather than adjustable air cushions. Because this configuration lacks the -S magnet option, it cannot host magnetic position sensing.
| Model | AirTAC SDA25X40BH 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).
Secures aluminum workpieces in a CNC machining center, utilizing the 245.4 N extend force to maintain rigid positioning against cutting forces.
Deploys the 40 mm stroke to tuck corrugated cardboard flaps on a high-speed packaging line prior to tape sealing.
Pushes lightweight parcels off a main conveyor belt, where the short riveted body minimizes structural interference alongside the transfer mechanism.
When sizing this actuator, evaluate your force margins in both directions. Stepping down to the SDA20 reduces the 0.5 MPa push capacity to 157.1 N, whereas stepping up to the SDA32 increases it to 402.1 N. For the SDA25X40BH, the safe working load is approximately 147 N (about 60 percent of the 245.4 N push figure), translating to a vertical lift capability of roughly 12.5 kg when applying a 2:1 safety margin. Confirm your ordering essentials: 25 mm bore, 40 mm stroke, M5x0.8 port, male M8x1.25 rod thread, and FKM seals. Keep in mind that a standard compact cylinder will drift and cannot hold a load if air pressure drops or the valve is centered; the fixed bumper only decelerates the stroke end and acts as neither a lock nor a brake. For suspended loads, specify an external rod lock or a pilot-operated check valve.
Quick checklist
This 25 mm bore double-acting cylinder provides 245.4 N push and 206.2 N pull at 0.5 MPa, or 343.6 N push and 288.6 N pull at 0.7 MPa. The theoretical maximum push force is 50 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and sustains speeds of 30-500 mm/s.
No. This model relies on fixed NBR bumpers to decelerate the stroke end and does not feature an adjustable air cushion. Additionally, the SDA25X40BH lacks the -S magnet option, so it cannot support reed or electronic switches; you would need the -S variant for position sensing.
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