The AirTAC AirTAC SDA25X85B Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm bore and 85mm 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 SDA25X85B is a double-acting, single-rod compact cylinder engineered to deliver a push force of 245.4 N and a pull force of 206.2 N at 0.5 MPa. Its short riveted body significantly reduces axial mounting depth compared to traditional round-body units, making it highly effective for tight machine footprints. The bore is hard-anodized and uses a two-way piston seal for reliable operation.
This specific SKU includes a male-thread piston rod end (M8x1.25) for secure mechanical coupling to your load. It operates at speeds between 30-500 mm/s and relies on a fixed NBR bumper at each end to decelerate the stroke. Because this configuration lacks the -S magnet option, it cannot support AirTAC reed or electronic switches.
| Model | AirTAC SDA25X85B Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 85 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. |
| ×85 | 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 flap on a logistics conveyor to sort parcels, utilizing the 85mm stroke to push packages cleanly into secondary chutes without excessive axial bulk.
Drives the mechanical folder arms on a case erector, applying the 245.4 N push force to tuck heavy cardboard flaps prior to tape sealing.
Positions side-rail guides on a surface mount technology line, using the male M8x1.25 rod thread to secure custom tooling that aligns circuit boards for pick-and-place assembly.
When sizing this unit, evaluate your force needs in both directions. Stepping down to the SDA20 bore reduces the 0.5 MPa push capacity to 157.1 N, while stepping up to the SDA32 bore increases it to 402.1 N. For this 25mm bore, the theoretical safe working load is approximately 147 N (about 60% of the 245.4 N figure), allowing a vertical lift of roughly 12.5 kg with a 2:1 safety margin.
Remember that a standard compact cylinder drifts when air pressure is lost or the valve is centered, as the fixed NBR bumper only decelerates near stroke end rather than locking the piston. If your application requires position holding, you must integrate an external rod lock or a pilot-operated check valve. To order, confirm the 25mm bore, 85mm stroke, M5x0.8 port, male M8 rod thread, and no magnet.
Quick checklist
This 25mm bore double-acting cylinder provides a push force of 245.4 N and a pull force of 206.2 N at 0.5 MPa. At 0.7 MPa, the push force is 343.6 N and the pull force is 288.6 N. The theoretical maximum push force is 50 kgf at 1.0 MPa.
No, this specific SKU does not include the -S option, meaning it lacks a piston magnet and cannot trigger reed or electronic switches. Additionally, end-of-stroke deceleration is handled by a fixed NBR bumper, which is not an adjustable air cushion, so high-speed applications may require external shock absorption.
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