The AirTAC AirTAC SDA20X75SB Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 75mm 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 SDA20X75SB is a double-acting, single-rod compact cylinder engineered to deliver 157.1 N of push force at 0.5 MPa. Its short riveted body integrates the barrel, rear cover, piston, and rod into a highly space-efficient package, significantly reducing axial mounting depth compared to standard round-body units. The 20 mm bore features a hard-anodized inner wall and a two-way piston seal for reliable low-friction operation.
This specific configuration includes a built-in piston magnet (S) for position sensing and a male M6x1.0 threaded rod end (B) for secure load coupling. Grooves around the body accept AirTAC reed or electronic switches to track the 75 mm travel. End-stopping relies on a fixed NBR bumper that decelerates the piston near stroke limits; it is not an adjustable air cushion, so external shock absorbers are advised for high-energy cycles.
| Model | AirTAC SDA20X75SB Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 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. |
| ×75 | 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).
Drives the Z-axis plunge on a light printed circuit board routing spindle, utilizing the 75 mm stroke and male M6 rod to maintain precise depth control within a tight machine enclosure.
Actuates a folding arm on a small case erector, using the 157.1 N push force to tuck corrugated flaps prior to tape sealing without overwhelming the lightweight packaging frame.
Positions a fluid dispensing nozzle over microplate wells, relying on the integrated magnet and an electronic switch to confirm the exact 75 mm travel position for accurate reagent delivery.
When sizing this unit, consider stepping down to the SDA16, which provides 100.5 N of push at 0.5 MPa, or moving up to the SDA25, which yields 245.4 N at the same pressure. The 20 mm bore offers a computed safe working load of roughly 94 N (about 60% of the 157.1 N figure) and can vertically lift approximately 8 kg with a 2:1 safety margin. Ensure your ordering essentials match this exact specification: 20 mm bore, 75 mm stroke, M5x0.8 port, built-in magnet, and the male M6x1.0 rod thread.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure is lost or the directional valve is centered—the piston will drift, and the fixed bumper only decelerates it near the stroke end rather than locking it. If your application requires true position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve into the pneumatic circuit.
Quick checklist
This 20 mm bore double-acting cylinder generates 157.1 N of push and 131.9 N of pull at 0.5 MPa. At 0.7 MPa, the push increases to 219.9 N and the pull to 184.7 N. The theoretical maximum push is 32 kgf at 1.0 MPa. It operates 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.
It uses a fixed NBR bumper at each end to decelerate the piston near the stroke limits; this is not an adjustable air cushion, so high-speed applications may require external shock absorption. The SB option includes a built-in piston magnet designed to trigger AirTAC reed or electronic switches mounted in the body grooves.
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