The AirTAC AirTAC SDA20X55BH Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 55mm 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 SDA20X55BH is a double-acting single-rod compact cylinder engineered for tight machinery footprints. Its riveted assembly minimizes axial mounting depth, delivering 157.1 N of push force at 0.5 MPa. This specific SKU features a male M6x1.0 piston rod end and high-temperature fluororubber (FKM) seals for enhanced oil and thermal resistance.
Instead of an adjustable air cushion, the unit relies on a fixed NBR bumper at each end to decelerate the stroke. Note that this configuration lacks a piston magnet, so it cannot support position sensing without switching to the -S variant. The hard-anodized 20 mm bore operates at speeds from 30-500 mm/s.
| Model | AirTAC SDA20X55BH Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 55 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. |
| ×55 | 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 cutting head feed on an electronics depaneling machine, utilizing the 55 mm stroke and FKM seals to resist ambient flux vapors.
Pushes lightweight parcels onto a secondary conveyor line, where the short 20 mm bore body conserves valuable frame space.
Drives the tamp pad forward to press adhesive labels onto cartons, handling the 8 kg vertical load margin safely.
When sizing this 20 mm bore, 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 current 157.1 N rating, a safe working load is roughly 94 N (about 60% capacity), translating to a vertical lift of approximately 8 kg with a 2:1 safety margin. Confirm your ordering essentials: 20 mm bore, 55 mm stroke, M5x0.8 port, male M6x1.0 rod, and no magnet.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure drops or the valve is centered—the piston drifts, and the fixed bumper only slows travel near the stroke ends. To maintain position without live pressure, integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 20 mm bore cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa. 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.
No, this specific SKU lacks the -S option, meaning there is no piston magnet and it cannot trigger AirTAC reed or electronic switches. You would need the -S variant for position sensing.
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