The AirTAC AirTAC SDA20X20S Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 20mm 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 SDA20X20S is a double-acting, single-rod compact cylinder engineered to deliver 157.1 N of push force at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and rod into a highly short axial package, drastically reducing mounting depth where a conventional round-body unit would not fit. The 20 mm bore features a hard-anodized inner wall and an 8 mm piston rod.
This specific configuration includes the -S option, meaning it has a built-in piston magnet for tracking position along the body grooves using an AirTAC reed or electronic switch. End-stop deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, which keeps the footprint minimal but requires an external shock absorber if operating at the top of the 30-500 mm/s speed range.
| Model | AirTAC SDA20X20S Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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. |
| ×20 | 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).
Provides the 157.1 N extension needed to plunge a routing bit through FR4 fiberglass boards, utilizing the short 20 mm stroke for rapid cycling.
Actuates mechanical fingers to tuck minor flaps on packaging lines, where the compact riveted body fits neatly within tight conveyor side frames.
Moves a volumetric pipette head over microplates, using the built-in magnet and an electronic switch to confirm the exact 20 mm dispensing depth.
When sizing this 20 mm bore, compare its 157.1 N push at 0.5 MPa against adjacent options: stepping down to the SDA16 yields 100.5 N, while stepping up to the SDA25 provides 245.4 N. A practical safe working load is roughly 94 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of approximately 8 kg with a 2:1 safety margin. To order, confirm the 20 mm bore, 20 mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the required -S magnet. Remember that a plain compact cylinder drifts if air pressure is lost; maintaining a vertical load requires an external rod lock or pilot-operated check valve.
Quick checklist
This double-acting cylinder provides 157.1 N push and 131.9 N pull at 0.5 MPa, and 219.9 N push at 0.7 MPa. 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 relies on a fixed NBR bumper at each end to decelerate the piston. It is not an adjustable air cushion and does not function as a locking brake. For high-energy cycles, slow the approach speed or add an external shock absorber.
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