[sdiy] Two really dumb questions re Schaeffer and soldering

[Andre Majorel]

On 2002-08-09 12:05 -0700, Jim Johnson wrote:

> 1) I'm working on a Schaeffer panel layout, and I need some
> countersunk holes. But.. damn.. there are four choices for the type of
> countersink: (DIN 74A through C, and DIN 661). I know that if I go
> into the local "screw and nut" store and ask for screws with a
> specific countersink angle, they'll look at me like I'm the nut (ohh,
> witty).. so how do I know what to use for generic metric screws?

I don't know the DIN countersink specs. All I can say is that all
my metric countersunk screws, from M2.5 to M5, seem to have a 90°
angle. I don't have anything to measure the exact angle, but it
sure looks like 90°.

A bit of googling will surely give you the details of the DIN
specs. That's what I used a few days ago to find out what those
obscure US screw sizes mean. I'm pleased to know that a #10 screw
is 4.83 mm in diameter. :-)

Not that it matters much ; I always do my countersunk holes with
ordinary bits (i.e. the angle is more like 110° or 120°) and I'm
satisfied with the results.

> The Schaeffer help is just a little misleading (one type for metal
> screws, and one for "normal" screws.. oh, great).

Hm... If normal is not metal, I wonder what they call normal...

-- 
André Majorel <amajorel at teaser.fr>
http://www.teaser.fr/~amajorel/