The AirTAC AirTAC SDA50X55B Compact Cylinder | 50mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø50mm bore and 55mm 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 SDA50X55B is a double-acting, single-rod compact cylinder engineered to deliver a push force of 981.7 N and a pull force of 824.7 N at 0.5 MPa. Its short riveted body design significantly reduces axial mounting depth, making it highly effective for machinery where a standard round-body unit would simply be too long. The bore is hard-anodized and utilizes a two-way piston seal for reliable pneumatic performance.
This specific SKU includes a male M18x1.5 threaded piston rod end for robust mechanical coupling to your load. It operates at speeds between 30 and 500 mm/s and relies on a fixed NBR bumper at each end to decelerate the stroke. Note that because this configuration lacks the -S magnet option, it cannot directly host AirTAC reed or electronic switches.
| Model | AirTAC SDA50X55B Compact Cylinder | 50mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø50 mm |
| Stroke | 55 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. |
| ×55 | 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).
Routes heavy PET bottle crates on a packaging conveyor using the 981.7 N extend force, fitting neatly within the machine's tight transfer station footprint.
Drives a mechanical arm to fold heavy cardboard flaps prior to sealing, relying on the 55mm stroke and male M18x1.5 rod end for a rigid connection.
Secures heavy cast iron engine blocks during machining operations, providing stable clamping without occupying excessive axial bay depth.
When sizing this unit, consider stepping down to the SDA40, which provides 628.3 N of push force at 0.5 MPa, or moving up to the SDA63, which yields 1558.6 N at the same pressure. A useful computed insight for the 50mm bore is that its safe working load is approximately 589 N (about 60% of the 981.7 N figure), translating to a vertical lift capacity of roughly 50 kg with a 2:1 safety margin. Be aware that a plain cylinder does not hold its load if air pressure is lost or the valve is centered; the piston will drift, and the fixed bumper only decelerates near the stroke end. For secure load holding, an external rod lock or pilot-operated check valve is required.
To finalize your order, confirm these essentials: 50mm bore, 55mm stroke, PT1/4 port, no sensor magnet, and the male M18x1.5 rod thread.
Quick checklist
At 0.5 MPa, the push force is 981.7 N and the pull force is 824.7 N. At 0.7 MPa, the push force is 1374.4 N and the pull force is 1154.5 N. The theoretical maximum push force is 200 kgf at the maximum operating pressure of 1.0 MPa.
It uses a fixed NBR bumper at each end to decelerate the piston near the stroke limits; this is not an adjustable air cushion. Furthermore, it does not function as a lock or brake, so if air is lost, the piston will drift. For vertical loads that must be held without live pressure, you must add an external rod lock or pilot-operated check valve.
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