>> "Yes, you are missing that you are not allowed to
>> solder perpendicular surfaces. A piece of wire
>> could be bent to make a surfaces parallel to PCB;
>> component leads can't (at least on the component's
> side)."
>
> Some work standards specify that all leads must be
> bent against the board before soldering. This prevents
> parts from falling out in the wave soldering system and
> also prevents parts from falling out later if some failure
> causes overheating under vibration. The standards are
> likely military or high endurance related and no-one
> uses them in consumer equipment, unless absolutely
> necessary.

We are talking about professional, not consumer equipment. And we are
talking about soldering through hole only to single-layered PCB.

And also your phrase "no-one uses them in consumer equipment, unless
absolutely necessary." seems to be a tautology.  Unless absolutely
necessary no one would use anything in equipment.


> Reworking such boards is a pain.

Single-layered PCB normally are NOT meant to be under re-working
regardless of the bent/non-bent pins. And even if they are, you may
wish to just cut the pins off the component before de-soldering them,
- heat and pull them from the plated side of the PCB; or just heat the
pin with the iron and insert the stainless steel strip between the
bent pin and PCB copper layer, or do whatever else using right tools,
- not a problem for a good dancer :-)

Regards.

>
> Preformed component leads can be made to touch the PCB horizontally
> before making a 90 degree turn and entering the hole in the PCB.
> Then the lead can be bent again to prevent falling out, or not.
> Preformed leads of this type are obligatory for parts which must
> stand off from the PCB, such as power resistors and LEDs, unless
> spacers are used. Lead pre-formers are cheap and available, and
> should be used if needed ...
>
> -- Peter
>
>
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