Learn about these drills and don't let a little concrete get in your way The post Rotary Drill vs. Hammer Drill: What’s the ...

In contrast to percussion drilling, which consists of continuously dropping a heavy weight in the wellbore to chip away at the rock, rotary drilling uses a rotating drill bit to grind, cut ...

If you need to drill holes in masonry or concrete, you may have heard about, or come across, hammer drills. There are two ...