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Topic: resistor reliability: small, leaded resistors are a ceramic tube with crimped-on end caps. The carbon coating is then applied. The only failure mode for this construction (the only choice) is to apply a bending force to the end caps. You can buy a bending tool. This tool is a tapered plastic strip, about 5 inches long, with descending widths, to put your part on, and then bend the leads down. If you bend too close to the body, you will loosen the end caps. If your PCB is laid out with minimum leed spacing, you can get into trouble. I don't think anyone can bend a leed with this tool and not tug on the end caps. The SAFEST method is to specify the leed spacing which allows you to use a pair of small needle nose pliers, to hold the leed close the the body, and bend the FREE end.
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