The AirTAC AirTAC SDA20X70B Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 70mm 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 SDA20X70B 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 mounting depth compared to conventional round-body designs. This specific configuration includes a male M6x1.0 piston rod thread for straightforward load coupling.
The 8 mm hard-anodized piston rod operates within a 30-500 mm/s speed range, fed by an M5x0.8 port. End-of-stroke deceleration relies on fixed NBR bumpers rather than adjustable air cushions, meaning high-energy cycles may require external shock absorbers. This SKU lacks a piston magnet and therefore cannot support magnetic sensing.
| Model | AirTAC SDA20X70B Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 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. |
| ×70 | 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).
Uses the 70 mm stroke to push singulated circuit boards out of a routing fixture, capitalizing on the short body length to fit within dense electronics assembly machinery.
Folds minor corrugated flaps prior to tape sealing on automated packaging lines, where the 157.1 N extend force easily overcomes cardboard resistance.
Actuates a pipetting or dosing head for fluid handling, benefiting from the 30-500 mm/s velocity range to optimize laboratory sample throughput.
When sizing this actuator, stepping down to the SDA16 yields 100.5 N of push at 0.5 MPa, while stepping up to the SDA25 provides 245.4 N at the same pressure. For the current 20 mm bore, a safe working load is approximately 94 N (about 60% of the 157.1 N figure), translating to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. To finalize your order, confirm the 20 mm bore, 70 mm stroke, M5x0.8 port, and the male M6x1.0 rod thread.
Note that a standard double-acting cylinder will not hold a load if air pressure drops or the directional valve is centered; the piston will drift, and the fixed NBR bumper only decelerates the stroke end without acting as a mechanical lock. If your application demands position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa, this 20 mm bore cylinder provides 157.1 N of push force and 131.9 N of pull force. At 0.7 MPa, push increases to 219.9 N and pull to 184.7 N. The theoretical maximum push force is 32 kgf at 1.0 MPa, which is the maximum operating pressure.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches. You would need to specify the -S option (SDA20X70BS) to enable magnetic sensing in the body grooves.
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