If you try http://www.ucc-udb.com/metric-inch.htm it should answer most of
your questions,
regards
Ivor Phillips
XS486
----- Original Message -----
From: "Fergus Kyle" <VE3LVO@rac.ca>
Subject: Re: Europa-List: metric drill bits
>
>
> ----- Original Message -----
> From: "Fred R. Klein" <fklein@orcasonline.com>
> Subject: Europa-List: metric drill bits
> Hi to All who have gone before me,
> I make note of the list of metric drill bits on Pg. 1-3 of manual. After
> determining that the 3.3mm bit is essential for the flush pop rivits, I've
> found that McMaster-Carr carries a line of metric drill bits.| Lazy as I
am,
> I have not searched through the entire manual to determine whether the
> 4.2mm, 4.8mm, 10.2mm, and 12mm are similarly essential, or if they are
> simply metric equivalents for the listed fractional-inch sizes also
listed.
> Before I order all the listed metric bits, can someone enlighten me as to
> whether or not they are essential...assuming of course that one has a full
> set of fractional-inch bit sizes? Metrically-challenged Fred, A194
>
> Fred,
> You will get a lot of answers probably better than mine as I
am
> no machinist but I hear you and your confusion. My experience as a tyro
> builder but having some woodwork time, is that you cannot have enough
drill
> bits. I found that the most useful tool for drilling is a digital
> micrometer. Not only is it usefull for finding out what the diameter of a
> bit is (after it's been used and rubbed out the figure), but that it will
> come into use for other tasks as well. I also bought a set of numbered
> drills - from number40 on down - because the parts provided were not
always
> drilled exactly on the specified diameter. We're talking tenthousands
here,
> because that's often the difference between a comfortable fit, a sliding
fit
> or a tight fit. The micro told me that some numbered drills were better
than
> 4.8mm or 3/16" when a certain fit was called for. My inspector is
fastidious
> about 'slop' and you don't want a sloppy fit in the control run, so
getting
> the right sized hole makes the difference.
> I'll leave the others to suggest the right sized drill bits to
> get, but be sure you'll need more than one 3/16" [-3] before you're done.
> ....and good luck!
> Ferg
> Europa A064
> PS: If no one else antes up with the drill bit sizes come back to me and
> will search out.
>
>
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