The AirTAC AirTAC SDA20X40H Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 40mm 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 SDA20X40H is a double-acting single-rod compact cylinder engineered for tight machinery footprints. Its riveted body assembly minimizes axial length, fitting where round-body units cannot. This specific SKU features fluororubber (FKM) seals for enhanced thermal and oil resistance, operating across a 0.15-1.0 MPa pressure range. It yields 157.1 N of push force and 131.9 N of pull force at 0.5 MPa.
This 20mm bore model incorporates an 8mm piston rod and an M5x0.8 air port. End-stroke deceleration relies on a fixed NBR bumper at each end rather than an adjustable air cushion. Because this base configuration lacks a piston magnet, it cannot support magnetic position sensing without upgrading to the -S variant.
| Model | AirTAC SDA20X40H Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 90 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 | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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. |
|---|---|
| 20 | 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).
Routes printed circuit boards with a 94 N safe working load, where the short 40mm stroke and compact riveted body minimize Z-axis height requirements.
Applies 157.1 N of clamping force at 0.5 MPa for thin film sealing, leveraging FKM seals to withstand elevated ambient temperatures near heat sealing jaws.
Pushes small parcels on a conveyor line using an 8mm piston rod, relying on the fixed NBR bumper to absorb the end-stop impact within the 30-500 mm/s speed range.
When sizing this actuator, evaluate your neighbours: the SDA16 provides 100.5 N push at 0.5 MPa for lighter duties, while the SDA25 offers 245.4 N for heavier demands. For this 20mm bore, the safe working load is approximately 94 N (about 60% of the 157.1 N figure), translating to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. Confirm your ordering essentials: 20mm bore, 40mm stroke, M5x0.8 port, female M4x0.7 rod thread, and FKM seals. A plain cylinder drifts when air is lost or the valve is centred, as the fixed bumper only decelerates near stroke end; specify an external rod lock or pilot-operated check valve if the application must hold a load without live pressure.
Quick checklist
This double-acting 20mm bore cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa. At 0.7 MPa, it yields 219.9 N push. The theoretical maximum push is 32 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
No, this specific SKU lacks a piston magnet and cannot trigger AirTAC reed or electronic switches. You must select the -S option code to enable sensing. Additionally, end stops use a fixed NBR bumper, not an adjustable air cushion, so add external shock absorbers for high-energy loads.
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