The AirTAC AirTAC SDA20X55H 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 SDA20X55H is a double-acting single-rod compact cylinder engineered with a 20 mm bore and 55 mm stroke. It generates 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. This specific SKU utilizes a fluororubber (FKM) seal variant, providing enhanced thermal stability and oil resistance compared to standard NBR rubber. The riveted unibody design drastically reduces axial mounting depth, fitting into tight machine footprints where conventional round-body actuators fail.
This model features an 8 mm piston rod and an M5x0.8 air port. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be specified for high-energy cycling. Because this configuration lacks the -S magnet option, it cannot directly host AirTAC reed or electronic switches for position sensing.
| Model | AirTAC SDA20X55H 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).
Provides the 157.1 N push stroke needed to eject cut circuit boards from a routing fixture, where the FKM seals withstand localized frictional heat.
Maintains precise dancer-arm tension on vertical packaging film feeds, capitalizing on the short 55 mm stroke and compact body depth to fit inside narrow frame gaps.
Drives a metered valve for adhesive dispensing in thermal curing environments, leveraging the fluororubber seals to resist elevated ambient temperatures.
When sizing this actuator, evaluate your force margins carefully. Stepping down to the SDA16 yields 100.5 N of push at 0.5 MPa, while moving up to the SDA25 provides 245.4 N. At 157.1 N, this 20 mm bore achieves a safe working load of roughly 94 N (about 60% capacity) and can vertically lift approximately 8 kg with a 2:1 safety factor. If your mechanism must maintain vertical position during air loss or valve centering, note that the piston will drift; the fixed bumper only decelerates near stroke end and acts as no lock. You must integrate an external rod lock or pilot-operated check valve for secure holding.
To finalize your RFQ, verify this exact configuration: 20 mm bore, 55 mm stroke, M5x0.8 port, female M4x0.7 rod thread, FKM seals, and no sensor magnet.
Quick checklist
This double-acting 20 mm bore cylinder delivers 157.1 N push and 131.9 N pull at 0.5 MPa, or 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. Operating pressure spans 0.15-1.0 MPa, with a speed range of 30-500 mm/s.
No, this specific SKU lacks the internal piston magnet. To use AirTAC reed or electronic switches, you must select the -S option. Additionally, this version uses fixed NBR bumpers for end-stop deceleration, not an adjustable air cushion, so external shock absorption is advised for high-speed operations.
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