Ian White GM3SEK wrote in
:

There's a potential language gap here, but "electric hammers" fall into
three broad groups. Working downward in size:

Ian,

The device I use (Hitach PH65) would be called a small electric
demolition hammer or concrete breaker (and it does not have rotation, it
is not a drill).

It has sufficient power to break through / deflect thin shale or small
rocks in the path.

Smaller pneumatic drills which can operate chasing chisels etc *may* work
fine in soft soil for shorter electrodes. It is probably possible to make
a driving adapter by cutting the end off a chisel or point and welding a
peice of pipe of 100mm length and snug fit over the chisel to create a
socket to locate the adapter over the electrode.

I usually place a few wraps of electrical tape over the rod end to reduce
the damage to the copper cladding and reduce spreading or noodling of the
end of the rod, especially if another rod will be driven behind it using
a coupler.

Owen