I recently bought myself a little twist drill - it is about the size
of a marking pen and takes drills up to maximum 2mm diameter. I have
been looking for these in catalogues and display rooms but never
found any until I stumbled into a shop that supplies mainly hobbyist
lapidarists and crosses over a little into jewellers tools. The twist
drill I got is made out of aluminium and was very inexpensive - it
was the only one they had on offer for drills bits up to this size.
Anyway, when I got the drill home and tried it out it seems that it
spins the wrong way… or maybe the standard drill bits I’m using
with it are not the ones intended to be used with it? When I press
down to make the drill spin it goes “backwards”… but as I release
it spins in the correct direction… it seems wrong to me because I
would expect it to cut as there is downward pressure on it to help
cut into the metal. As it is at the moment I can’t successfully drill
a hole… Does anyone know if I’m doing something wrong?
The reason I wanted the drill is to drill holes that are
difficult/dangerous or impossible to do with the flexi -
occassionally I resort to drilling holes with a drill clamped in a
pin vice and turning it by hand - basically I’m wanting to replace
that method with something more efficient. I am wondering if maybe
the correct option for me would have been a traditional archimedes
drill - are these at all difficult to keep on course (perpendicular
to the metal you are drilling)?
As always, any help or advice will be much appreciated. Thanks.