Homebrew PCBs

Dear Stefan,
I use 0.7mm and I think is a good size. It does not break. Well.... You must
be carefully, but is the same care when you use a 1mm.

0.7 mm
1/4 W resistor Legs... VERY GOOD !
TO220 PAckage........ You must to use  a bigger diametter

Regards,
Jos\ufffd


-----Mensaje original-----
De: Stefan Trethan [mailto:stefan_trethan@...]
Enviado el: Lunes, 09 de Febrero de 2004 07:29 p.m.
Para: Homebrew_PCBs@yahoogroups.com
Asunto: [Homebrew_PCBs] drill sizes



Hi all

I know we have had this a dozen times before but if you have time
i would appreciate if you bother again.

I have to buy drills, following sizes are available:

0,60  (0,0236")
0,635 (0,025")
0,70  (0,0275")
0,75  (0,0295")
0,80  (0,0314")
0,838 (0,0329")
0,85  (0,0334")
0,90  (0,0354")
0,95  (0,0374")
1,05  (0,0413")
1,067 (0,042")
1,07  (0,0421")
1,10  (0,0433")

mm (inch)

you can select 200pcs, which to take?
i want the values choosen so that i run out of all dimensions at about the
same time.

I use more SMD now, so i will buy many of the 1,1mm size for power
transistors, connectors etc.

Until now i only had 0,8mm and 1mm, are the 0,6mm any good?
can i use them with a pivoting drill press and a proxxon IBM or will i
break them all?
are they good for any parts? which do fit in? dil ics without socket? to92
transistor legs?
1/4 watt resistors?
I know i could look in the datasheets for this but then i wouldn't know
how much space to add
so it would do no good. experience (from you) would be better.

i could figure out how much to take of the bigger dimensiones (throw a
coin or so ;-) ).
But i really wonder if the small sizes are any good.....


I'm really bad at choosing such things, i can never decide....
so i will listen what you suggest and then blame you ;-)

thanks a lot

ST




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