Yes, it is easy to drill into concrete and even easier into typicall brick wall. Now let's do a simple calculation...
Impact drill has about 30,000 to 50,000 ipm (impact per minute) to 'vibrate' the drill bit into masonry. In the video clip, it took 1 minute to drill into the concrete block... as assume it has 30,000 bpm. So, my hands received 30,000 beats of numbing vibration.. In addition, I need to PUSH hard and this increase the feel of the vibrations.
Now, HR2810, rotary hammer, has 4500 bpm, (blows/beats per minute)... and it really blews away the concrete while drilling at full power. It took 3 seconds, and my hands received 225 beats in terms of small and feel good vibration.

Rotary hammer has air cushion, which absorb most of the un-comfortable vibartions, and channels it to drill bit. I also not need to push hard. A small force just to keep the rotary hammer in place, and everything is taken care by the rotary hammer. Yes, at certain condition, it 'walks' or inches into concrete by itself.
225 vs 30k beats ...

Remember it is for ONE, again, ONE hole. Imagine you need to drill 20, 30, 50 of holes into walll or concrete....
I hope I described the feeling properly.

Anyone with rotary hammer, can share your impression, comparing the 'feel' on the rotary hammer vs impact drill. here.

Thank you.
This post has been edited by bahathir: Feb 9 2012, 09:57 AM