The AirTAC AirTAC SDA20X35B 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 SDA20X35B 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 ultra-short unit, drastically reducing axial footprint where a conventional round-body actuator cannot fit. This specific configuration includes a male M6x1.0 threaded piston rod end for secure mechanical load coupling.
The 8 mm hard-anodized bore operates at speeds between 30 and 500 mm/s via an M5x0.8 port. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning high-energy cycles may require an external shock absorber. Because this SKU lacks the -S magnet option, it cannot support magnetic position sensing.
| Model | AirTAC SDA20X35B 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).
Provides the 157.1 N push stroke needed to eject cut circuit boards from a routing fixture without stressing the delicate traces, utilizing the short body to fit within dense electronics assembly machinery.
Actuates a mechanical arm to fold minor corrugated box flaps prior to tape sealing, where the 35 mm stroke and fixed NBR bumper reliably absorb the impact of the folding motion at high cycle rates.
Pivots a lightweight routing flap on a package handling line, using the male M6x1.0 rod end to attach the linkage while conserving under-belt mounting space.
When sizing this 20 mm bore actuator, evaluate your force margins carefully. Stepping down to the SDA16 reduces the 0.5 MPa push capacity to 100.5 N, while stepping up to the SDA25 increases it to 245.4 N. For the SDA20X35B, the safe working load is approximately 94 N (about 60% of the 157.1 N figure), which translates to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin.
To finalize your order, confirm the 20 mm bore, 35 mm stroke, M5x0.8 port, and the -B male M6x1.0 rod thread. Note that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered; if your application must hold a load without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder generates 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 on filtered air between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports a speed range of 30-500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches. You would need the -S variant for position sensing. Additionally, end-stop deceleration relies solely on a fixed NBR bumper, which is not an adjustable cushion and cannot serve as a braking mechanism.
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