The AirTAC AirTAC SDA20X45S 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 SDA20X45S 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 short riveted body significantly reduces axial mounting depth, making it ideal for machinery where a traditional round-body actuator simply cannot fit. The 8 mm piston rod utilizes a female M4x0.7 thread, and the bore features a hard-anodized inner wall paired with a two-way piston seal for reliable service.
Because this unit includes the -S option, it comes with a built-in piston magnet for position sensing via AirTAC reed or electronic switches mounted in the body grooves. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach or add external shock absorbers for high-energy loads. Operating speed ranges from 30-500 mm/s.
| Model | AirTAC SDA20X45S 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).
Provides the 157.1 N push required to clamp populated circuit boards securely during automated routing and cutting processes.
Utilizes the 45 mm stroke to extend a routing flap at high speed, redirecting small parcels on a logistics distribution line.
Actuates folding arms to close minor flaps on packaging lines, fitting easily into tight axial spaces between rollers.
When sizing this actuator, evaluate your force requirements bidirectionally: 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. For the SDA20X45S, the 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, 45 mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the required -S magnet option. Note that a plain compact 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 at pressures from 0.15-1.0 MPa, with a speed range of 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the piston near stroke completion, which is not an adjustable air cushion. Additionally, it cannot hold a load if air is lost; you must use an external rod lock or pilot-operated check valve for position holding.
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