The AirTAC AirTAC SDA20X90S Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 90mm 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 SDA20X90S is a double-acting, single-rod compact cylinder engineered to deliver 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and rod into an exceptionally short axial package, drastically reducing mounting depth where a conventional round-body unit would be too bulky. The bore is hard-anodized for longevity, operating at speeds between 30 and 500 mm/s.
This specific configuration includes a 90 mm stroke (approaching the 100 mm maximum for this bore) and a built-in piston magnet (-S) for position sensing via AirTAC reed or electronic switches seated in the body grooves. End-of-travel deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be specified for high-energy cycles. The 8 mm rod utilizes a female M4x0.7 thread end, while the air supply connects via an M5x0.8 port.
| Model | AirTAC SDA20X90S Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 90 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. |
| ×90 | 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 the tooling head on an electronics assembly line, utilizing the 90 mm stroke to clear the fixture during board loading and unloading.
Pushes lightweight parcels from a main transport belt into a packing chute, leveraging the 157.1 N push force and compact footprint.
Drives the mechanical arm that tucks minor flaps on a packaging conveyor, fitting neatly into tight machine frames using its short riveted body.
Selecting this 20 mm bore yields a safe working load of roughly 94 N (about 60% of the 157.1 N push at 0.5 MPa), translating to a vertical lift capacity near 8 kg with a 2:1 safety margin. If your application requires less force, stepping down to the SDA16 provides 100.5 N at 0.5 MPa; conversely, the SDA25 offers 245.4 N for heavier payloads. Keep in mind that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates the stroke end rather than locking the rod—implement an external rod lock or pilot-operated check valve if position holding is critical. When ordering, verify the 20 mm bore, 90 mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the required magnetic sensing option.
Quick checklist
At 0.5 MPa, the push force is 157.1 N and the pull force is 131.9 N. At 0.7 MPa, the push force is 219.9 N and the pull force is 184.7 N. The theoretical maximum push force is 32 kgf at 1.0 MPa, with an operating pressure range of 0.15-1.0 MPa.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. Additionally, the cylinder cannot hold a load if air is lost; the piston will drift, so an external rod lock or pilot-operated check valve is required for position holding.
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