--- In 7x12minilathe@y..., "Capt Ken Appleby" <captkenn@m...> wrote:
Hi Mike,
In each case the drill is broken off below the surface and they are
2mm drills, so are quite small. I tried to do the Alum method
advised by an earlier reply. Unfortunately, in the UK, Alum is no
longer readily obtainable "at the local pharmacist". In fact (snip)
Yup...2mm is a little tough to work around. It reminds me though
Capt. Ken that recently I saw an article on an extremely simple EDM
that was just a vertical slide that lowered an electrode into a bowl
of water. The power was from the mains with two light bulbs on each
phase. The examples showed nice clean small cuts using wire rod with
brazed shapes as electrodes. I've surfed by other edm projects on
the net. If you'd like I'll try to look it up and scan it....It was
in Home Shop Machinist some months ago I think.
I have to confess Ken, I don't have a 7 x 12 but I've had a 7 x 10
for years. Although I'm in Canada I ordered the repair kit from
Little Machine Shop and was more than pleased. It has replacements
for all the driving gears, new driver transistors and belts and cross
slide nut. The price is so low it may be worthwhile ordering from
them and paying the shipping. I'm not aware of any similar supplier
on your side.
My preferance on the nut would be to buy a 10 x 1 mm LH tap and make
my own but then I've never had the trouble.
Give me email off line if you need the scans.
Mike
