The AirTAC AirTAC SDA20X20H 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 SDA20X20H is a double-acting single-rod compact cylinder engineered for tight machinery footprints. Its short riveted body significantly reduces axial mounting depth compared to round-body alternatives, while delivering 157.1 N of push force at 0.5 MPa. This specific SKU features an FKM (fluororubber) seal for enhanced thermal and oil resistance within the standard -20 to +70 C operating range.
Built with a hard-anodized bore and a two-way piston seal, the unit relies on a fixed NBR bumper at each end to decelerate the stroke end. This bumper is not an adjustable air cushion, so high-speed applications may require an external shock absorber. The Ø8 mm piston rod uses a female M4x0.7 thread, and because this base model lacks the -S magnet option, it cannot accept magnetic reed or electronic switches.
| Model | AirTAC SDA20X20H 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).
Routes printed circuit boards with a 94 N safe working load, utilizing the compact riveted body to fit within dense electronics assembly machinery.
Cycles a 20 mm stroke to press sealing dies, where the FKM seal withstands thermal exposure and lubricating oils better than standard NBR.
Actuates a lightweight routing flap on a conveyor line, taking advantage of the 8 kg vertical lift capacity and space-saving axial length.
When sizing this 20 mm bore actuator, consider stepping down to the SDA16 (100.5 N push @0.5 MPa) for lighter duties, or up to the SDA25 (245.4 N push @0.5 MPa) if your payload demands greater thrust. For the SDA20X20H, the computed safe working load is roughly 94 N (about 60% of the 157.1 N @0.5 MPa figure), translating to a vertical lift capacity of approximately 8 kg with a 2:1 safety margin.
Note that a standard compact cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates near the stroke end rather than locking the rod. If your application requires position holding, an external rod lock or pilot-operated check valve is necessary. Confirm your ordering essentials: 20 mm bore, 20 mm stroke, M5x0.8 port, FKM seals, female rod thread, and no sensor magnet.
Quick checklist
This 20 mm bore 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. It operates at 30-500 mm/s, with an operating pressure range of 0.15-1.0 MPa and a proof pressure of 1.5 MPa.
No, this specific SKU does not include a piston magnet, so it cannot trigger reed or electronic switches. You would need the -S option variant for sensing capabilities. Additionally, end-of-stroke deceleration is handled by a fixed NBR bumper, not an adjustable air cushion.
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