The AirTAC AirTAC SDA50X40S Compact Cylinder | 50mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø50mm bore and 40mm 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 SDA50X40S 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 assembly merges the barrel, rear cover, piston, and rod into a highly shortened unit, drastically reducing axial mounting depth compared to conventional round-body designs. The 50 mm bore features a hard-anodized inner wall and a two-way piston seal for reliable service.
Equipped with a built-in piston magnet (-S option), this model is ready for position detection using an AirTAC reed or electronic switch seated in the body grooves. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be specified for high-energy cycles. The 20 mm rod terminates in a female M10x1.5 thread, operating via a PT1/4 port at speeds between 30 and 500 mm/s.
| Model | AirTAC SDA50X40S Compact Cylinder | 50mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø50 mm |
| Stroke | 40 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. |
| ×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 heavy cast iron engine blocks onto machining centers using 981.7 N of extend force, while the short riveted body minimizes interference with the cutting tool path.
Drives mechanical arms to fold heavy-duty cardboard flaps on automated packaging lines, benefiting from the 30-500 mm/s speed range and reliable magnetic position feedback.
Actuates intermediate lift mechanisms on palletizing stations where the 50 mm bore handles the load, but an external check valve is added to prevent drift on air loss.
Selecting this 50 mm bore makes sense when your application requires roughly 981.7 N of push at 0.5 MPa, which translates to a safe working load of about 589 N (60% capacity) or a vertical lift of approximately 50 kg with a 2:1 safety margin. If you need less force, stepping down to the SDA40 yields 628.3 N at 0.5 MPa; conversely, scaling up to the SDA63 provides 1558.6 N. Keep in mind that a plain compact cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates the stroke end without locking the load. For vertical holding, an external rod lock or pilot-operated check valve is required. When ordering, confirm the 50 mm bore, 40 mm stroke, PT1/4 port, female M10x1.5 rod thread, and the -S magnet option.
Quick checklist
This double-acting cylinder generates 981.7 N push and 824.7 N pull at 0.5 MPa, and 1374.4 N push at 0.7 MPa. The theoretical maximum push force is 200 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. Additionally, it does not hold position on air loss; the piston drifts, requiring an external rod lock for load holding.
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