The AirTAC AirTAC SDA20X45BH 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 SDA20X45BH is a double-acting single-rod compact cylinder engineered for tight axial spaces. It generates 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. This specific SKU includes a male M6x1.0 threaded piston rod for direct load coupling and utilizes fluororubber (FKM) seals for enhanced thermal and oil resistance. The hard-anodized bore ensures durability across its 45 mm stroke.
Its riveted body design drastically reduces overall mounting depth compared to conventional round-body cylinders, making it ideal for dense machinery layouts. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Because this configuration lacks the -S magnet option, it cannot support magnetic position sensing; adding an -S variant enables the use of reed or electronic switches in the body grooves.
| Model | AirTAC SDA20X45BH 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).
Actuates the tooling head on an electronic board depaneling machine, where the short 45 mm stroke and compact depth fit neatly within the routing gantry.
Provides the 157.1 N clamping force required to seal pharmaceutical blister packs, leveraging the FKM seals to withstand occasional thermal exposure.
Ejects processed vials from a centrifuge carousel using the male M6 rod end, delivering a safe 94 N working load to push components without damaging glass.
When sizing this actuator, evaluate your force requirements against adjacent bores: stepping down to the SDA16 provides 100.5 N of push at 0.5 MPa, while stepping up to the SDA25 yields 245.4 N. For the SDA20, 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. Operating speed ranges from 30-500 mm/s.
Confirm your ordering essentials: 20 mm bore, 45 mm stroke, M5x0.8 port, male M6x1.0 rod thread (B), and FKM seals (H). Note that a plain compact cylinder does not hold its position if air pressure is lost or the valve is centered—the piston will drift. If your application requires static load holding, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 20 mm bore double-acting cylinder provides 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 at 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds of 30-500 mm/s.
No, the SDA20 uses a fixed NBR bumper at each end to decelerate the piston near stroke end; it is not an adjustable air cushion. For high-speed or high-energy cycles, you should add an external shock absorber or slow down the pneumatic approach. Additionally, this bumper only absorbs impact and does not act as a brake to hold the load if air pressure is lost.
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