Through hole components -- drill size

Does anyone know of a chart on the web somewhere that has common components and their associated "common" drill size?

example -- 1/4 watt resistor .028 etc?

I'm setting up some custom components in my PCB software and this would come in handy.

I googled like crazy, but no luck.

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I ask for a finished hole size of 0.035" for most through-hole components. At one time (perhaps still) board shops charged extra if there were too many drill sizes on a board.

Peter Bennett, VE7CEI  
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Peter Bennett

For the really small diameter lead components you can make some assumptions, but beyond that you should do some measuring.

1/4W resistors, TO-92 transistors, most small capacitors, etc. can be .028, (but .035 is not a problem).

Until they get really big, electrolytics are OK with .035

IC sockets are OK in .028 until you get the occasional hole that gets "filled up" a little during manufacturing, and then you might wish you had used .035.

.1 inch headers are .040 in general, 1N400x diodes need .046

(This is all off the top of my head, see if you can get some other people to comments.)

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Gary Peek

#60..#65 drill

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