The AirTAC AirTAC SDA50X25SB Compact Cylinder | 50mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø50mm bore and 25mm stroke, PT1/4 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA50X25SB is a double-acting, single-rod compact cylinder engineered to deliver 981.7 N of push force and 824.7 N of pull force at 0.5 MPa. Its riveted body design significantly reduces axial mounting depth, making it ideal for machinery where a traditional round-body unit would occupy too much space. The 50 mm bore features a hard-anodized inner wall and a two-way piston seal for reliable, long-life operation.
This specific configuration includes the -S option for a built-in piston magnet, allowing seamless integration with AirTAC reed or electronic switches via the body's sensor grooves. The -B option provides a male M18x1.5 threaded piston rod end for secure mechanical coupling to your load. End-stopping is handled by a fixed NBR bumper which decelerates the piston near stroke end, rather than an adjustable air cushion.
| Model | AirTAC SDA50X25SB Compact Cylinder | 50mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø50 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×25 | 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 heavy cast iron engine blocks during machining operations, utilizing the 981.7 N push force to maintain rigid positioning against cutting forces.
Transfers filled cardboard cartons onto wooden pallets at the end of a packaging line, where the short 25 mm stroke and compact depth fit within tight conveyor clearances.
Ejects formed sheet metal brackets from a press die, relying on the male M18x1.5 rod end to withstand repeated high-impact mechanical contact.
When sizing this unit, consider stepping down to the SDA40, which provides 628.3 N of push at 0.5 MPa, or stepping up to the SDA63, which yields 1558.6 N at the same pressure. For the SDA50X25SB, the computed safe working load is approximately 589 N (about 60% of the 981.7 N figure at 0.5 MPa), translating to a vertical lift capacity of roughly 50 kg with a 2:1 safety margin. Ensure your ordering essentials are correct: 50 mm bore, 25 mm stroke, PT1/4 port, built-in magnet, and the male M18x1.5 rod thread.
Keep in mind that a standard compact cylinder does not hold its position if air pressure is lost or the directional valve is centered; the piston will drift, and the fixed bumper only decelerates it near the stroke end without acting as a lock. If your application requires a held load without live pressure, you must incorporate an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder provides a push force of 981.7 N and a pull force of 824.7 N at 0.5 MPa. At 0.7 MPa, the push force is 1374.4 N. The theoretical maximum push force is 200 kgf at 1.0 MPa. It operates within a pressure range of 0.15-1.0 MPa, has a proof pressure of 1.5 MPa, and supports a speed range of 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. For high-speed applications, you may need an external shock absorber. Additionally, it does not hold its load if air is lost; the piston will drift, requiring an external rod lock or pilot-operated check valve for position holding.
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