The AirTAC AirTAC SDA20X35S Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 35mm 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 SDA20X35S is a double-acting, single-rod compact cylinder engineered for tight machinery layouts. It generates 157.1 N of push force and 131.9 N of pull force at 0.5 MPa, operating efficiently between 30 and 500 mm/s. The riveted unibody design drastically reduces axial mounting depth compared to conventional round-body units, making it highly effective for footprint optimization.
This specific configuration includes a built-in piston magnet (the S option) for direct mounting of AirTAC reed or electronic switches along the body grooves. The 8 mm piston rod utilizes a female M4x0.7 thread, while the M5x0.8 port ensures reliable pneumatic supply. End-stopping relies on a fixed NBR bumper rather than an adjustable air cushion, decelerating the piston near stroke completion.
| Model | AirTAC SDA20X35S Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 35 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. |
| ×35 | 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 a routing blade carriage in electronics assembly, utilizing the 35 mm stroke and 157.1 N force to cleanly separate printed circuit boards within a confined equipment chassis.
Drives the upper heat platen on a small thermoforming line, applying consistent downward pressure to seal medical blister packs while fitting into the machine's shallow vertical envelope.
Toggles a precision dosing valve in an automated liquid handling station, where the integrated magnet triggers solid-state sensors to confirm open and closed positions.
Selecting this 20 mm bore provides a safe working load of roughly 94 N (about 60% of the 157.1 N push figure at 0.5 MPa), which translates to a vertical lift capacity of approximately 8 kg with a 2:1 safety margin. If your application requires less force, the SDA16 offers 100.5 N at 0.5 MPa; stepping up to the SDA25 yields 245.4 N. To finalize your order, confirm the 35 mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the required magnetic sensor. Keep in mind that a standard compact cylinder drifts when air pressure is lost or the valve is centered—the fixed bumper only decelerates near the end of travel and does not function as a locking brake. To suspend a load safely without live pressure, incorporate an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder delivers a push force of 157.1 N and a pull force of 131.9 N at 0.5 MPa. At 0.7 MPa, the push increases to 219.9 N. The theoretical maximum push is 32 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; it is not an adjustable air cushion. Additionally, it does not hold its load if air is lost or the valve is centered—the piston will drift. For load holding, an external rod lock or pilot-operated check valve is required.
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