The difficulty with using an electric impact tool for that is that most all of them I've seen have a very short stroke. Actually, most of them use a rotary motion on a plate to set up the impact, so the "stroke" is only a few hundredths of an inch. Not sure how well that would work for planishing.
Air tools, on the other hand, usually have a pretty decent stroke, and I often use a muffler gun to planish sheets of metal. They sell planishing bits to fit standard .401" air chisels and I have a couple of them. They also work just dandy for upsetting the ends of bars, etc. For the noise, I just wear ear plugs and muffs over them - stops both the percussive and bone conduction noises.
The difficulty with using an
The difficulty with using an electric impact tool for that is that most all of them I've seen have a very short stroke. Actually, most of them use a rotary motion on a plate to set up the impact, so the "stroke" is only a few hundredths of an inch. Not sure how well that would work for planishing.
Air tools, on the other hand, usually have a pretty decent stroke, and I often use a muffler gun to planish sheets of metal. They sell planishing bits to fit standard .401" air chisels and I have a couple of them. They also work just dandy for upsetting the ends of bars, etc. For the noise, I just wear ear plugs and muffs over them - stops both the percussive and bone conduction noises.
Rich