The AirTAC AirTAC SDA25X20SB 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 SDA25X20SB is a double-acting, single-rod compact cylinder engineered to deliver 245.4 N of push force and 206.2 N of pull force at 0.5 MPa. Its riveted body design integrates the barrel, rear cover, piston, and rod into a highly shortened assembly, drastically reducing axial mounting depth where a conventional round-body unit would be too long. The bore is hard-anodized and utilizes a two-way piston seal for reliable pneumatic performance.
This specific configuration includes a built-in piston magnet (-S) for position sensing via AirTAC reed or electronic switches seated in the body grooves, alongside a male M8x1.25 threaded rod end (-B) for direct load coupling. End-stop deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach speed or utilize external shock absorbers for high-energy loads.
| Model | AirTAC SDA25X20SB 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).
Actuates a routing blade assembly on an electronics manufacturing line, utilizing the 20 mm stroke and male M8 rod to cleanly separate printed circuit boards with precise 245.4 N force.
Folds minor corrugated box flaps on a continuous packaging conveyor, where the shortened riveted body saves axial space within tight machine guarding.
Ejects small metal pins from a progressive die set, relying on the fixed NBR bumper to absorb the 30 mm/s retraction impact without requiring external shock absorption.
Selecting this 25 mm bore provides a practical middle ground: it steps up from the SDA20 (157.1 N push @0.5 MPa) and sits below the SDA32 (402.1 N push @0.5 MPa). At 0.5 MPa, the safe working load is approximately 147 N (about 60% of the 245.4 N figure), translating to a vertical lift capacity of roughly 12.5 kg with a 2:1 safety margin. When ordering, confirm the 25 mm bore, 20 mm stroke, M5x0.8 port, male M8x1.25 rod thread, and the integrated magnet. Keep in mind that a standard compact cylinder drifts when air pressure is lost or the valve is centered; if your process demands strict position holding, incorporate an external rod lock or pilot-operated check valve.
Quick checklist
This double-acting cylinder generates 245.4 N push and 206.2 N pull at 0.5 MPa, increasing to 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, with an operating pressure range of 0.15-1.0 MPa.
No, the piston will drift if air is lost or the directional valve is centered. The fixed NBR bumper only decelerates the rod near the stroke end and does not function as a locking brake. For load-holding requirements, you must install an external rod lock or a pilot-operated check valve.
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