I have a board that takes a toroid laying down flat and a plastic disc with a hole in the centre and a steel bolt holds it down on the board. To assemble it a nut is manually held in place under the board while the bolt is screwed up. I was thinking how well would it work to put a steel bolt though the board with the brass nut underneath (no toroid fitted) and hope that the wave solders the brass nut but doesn't stick to the steel bolt. Would this work reliably? The toroid is mounted after the wave soldering step.
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A****min
Dec 12.2019, 18:57:41
Not a soldered nut, but a 'nut' with a protruding splined 'sleeve' that is pressed into the chassis plate or, in your case, the PCB. There is a lot of thermal load to solder a nut using wave soldering and the thread may become filled with solder. There is also the small matter of holding the nut in place during wave soldering.