The AirTAC AirTAC SDA20X45SB Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 45mm 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 SDA20X45SB 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 unites the barrel, rear cover, piston, and rod into a highly shortened axial footprint, conserving valuable mounting depth where a conventional round-body unit cannot fit. The hard-anodized bore minimizes friction, while the integrated -S piston magnet enables position detection via an AirTAC reed or electronic switch seated in the body grooves.
This specific configuration includes the -B option, meaning the 8 mm piston rod terminates in a male M6x1.0 thread for straightforward load coupling, replacing the standard female M4x0.7 interface. End-of-stroke energy is managed strictly by a fixed NBR bumper rather than an adjustable air cushion, decelerating the piston near stroke completion. Operating at speeds of 30-500 mm/s, it provides a safe working load of roughly 94 N (about 60% of the 0.5 MPa push figure) and can vertically lift approximately 8 kg with a 2:1 safety margin.
| Model | AirTAC SDA20X45SB Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 45 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. |
| ×45 | 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).
Pushes and aligns delicate printed circuit boards on an SMT pick-and-place conveyor using the male M6 rod end, capitalizing on the short 45 mm stroke and 157.1 N extend force.
Folds small corrugated cardboard flaps prior to case sealing, where the compact riveted body saves axial space on a tight packaging machine frame.
Drives a precision liquid dispensing valve in a diagnostic instrument, using the -S magnet to trigger an electronic switch for exact 45 mm dosing travel.
When sizing this 20 mm bore unit, compare its 157.1 N push at 0.5 MPa against adjacent bores: stepping down to the SDA16 yields 100.5 N, while stepping up to the SDA25 provides 245.4 N. To finalize your order, confirm the 20 mm bore, 45 mm stroke, M5x0.8 air port, built-in magnet (-S), and male M6x1.0 rod thread (-B). Keep in mind that a plain compact cylinder drifts when air pressure is lost or the valve is centred; the fixed NBR bumper only decelerates the stroke end and does not function as a locking brake. 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, increasing to 219.9 N push and 184.7 N pull 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 and a proof pressure of 1.5 MPa.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion; for high-speed cycling, add an external shock absorber. Additionally, the -B option equips the 8 mm rod with a male M6x1.0 thread instead of the default female M4x0.7.
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