The AirTAC AirTAC SDA20X50H Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 50mm 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 SDA20X50H is a double-acting, single-rod compact cylinder featuring a 20mm bore and 50mm stroke. It generates 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. This specific H-suffix variant utilizes a fluororubber (FKM) seal for enhanced heat and oil resistance, operating within the standard -20 to +70 C range. The hard-anodized bore and two-way piston seal ensure durable, leak-free performance.
Its short, riveted body design significantly reduces axial mounting depth compared to round-body cylinders, making it ideal for tight machine footprints. The unit features an 8mm piston rod and a female M4x0.7 rod-end thread for straightforward load coupling. End-stops are managed by a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach or use external shock absorbers for high-energy loads.
| Model | AirTAC SDA20X50H Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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. |
| ×50 | 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 extension force needed to plunge a routing spindle through printed circuit boards, where the 50mm stroke and compact riveted body fit neatly within dense electronics assembly machinery.
Drives a mechanical arm to tuck corrugated carton flaps prior to sealing, utilizing the FKM seal to withstand occasional lubrication overspray in high-speed packaging lines.
Actuates a lightweight diverter arm to redirect small parcels on a conveyor belt, with the 8mm rod and M4 female thread securely coupling to the gate linkage.
When sizing this actuator, consider stepping down to the SDA16, which provides 100.5 N of push at 0.5 MPa, or moving up to the SDA25, which offers 245.4 N at the same pressure. For the SDA20X50H, the computed safe working load is approximately 94 N (about 60% of its 157.1 N capacity), allowing for a vertical lift of roughly 8 kg with a 2:1 safety margin. To finalize your order, confirm the 20mm bore, 50mm stroke, M5x0.8 port, female rod thread, and FKM seal. Note that this specific SKU lacks a piston magnet, so position sensing is not supported without switching to the -S variant.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure is lost or the valve is centered; the piston will drift, and the fixed bumper only decelerates the stroke near its end. If your application requires a held position without live pressure, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This double-acting 20mm bore cylinder delivers a push force of 157.1 N and a pull force of 131.9 N at 0.5 MPa. At 0.7 MPa, the push force is 219.9 N. The theoretical maximum push force is 32 kgf at 1.0 MPa. The operating pressure range is 0.15-1.0 MPa, with a proof pressure of 1.5 MPa.
No. This model relies on a fixed NBR bumper at each end to decelerate the stroke, not an adjustable air cushion; high-speed applications may require external shock absorbers. Additionally, this SKU does not include a piston magnet, so it cannot support reed or electronic switches unless you specify the -S option.
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