In article ,
Ian White GM3SEK wrote:

Any SDS+ drill with the "rotary stop" option will make a very effective
hammer for earth rods.

Ian-

I found SDA+ hammer drills in a couple of the local hardware stores
today. The smallest was around 3 kilograms (6.5 pounds), but I suspect
is the "2 kilogram" class you refer to.

One question the sales people couldn't answer, was what you meant by
"rotary stop". The drills I saw all had a linear stop in the form of a
rod that can be adjusted to stop penetration of the drill bit at a
desired depth. Do you mean that kind of stop, or do you mean something
like stopping rotary action, leaving only the hammering action?

Fred
K4DII