Selective Soldering Generally uses two basic nozzle design types: One is the "round" nozzle, also known as a "bullet" or universal nozzle. It can approach any solder site from any direction, since it is completely radial in its design on the top.rnThe other is a component-specific wave or "letter-slot" nozzle, and its design is better suited to soldering rows of pins, such as found on an array. This nozzle shape is ideal for connectors, for example, a five or a six-row connector, with perhaps 40 to 50 pins in a row.
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