The principle of the electric hammer is that the driving mechanism is driven by the rotary motion of the drill bit,  and a reciprocating hammer-strike movement perpendicular to the turning direction. The electric hammer is driven by the  driving mechanism of the piston in a cylinder reciprocating compressed air,  the cylinder air pressure cycle changes in the cylinder to drive the hammer reciprocating hit the top of the brick,  as if we use a hammer percussion bricks, so name electric hammer.

The electric hammer is a type of electric drill, mainly used to drill holes in concrete, floors, brick walls and stone. Professional in the wall, concrete, stone above the hole, as well as multi-functional electric hammer, adjusted to the appropriate position with the appropriate drill can replace the ordinary drill, the use of electric pick.

Because the drill bit of the electric hammer rotates at the same time, it also produces rapid reciprocating movement (frequent impact) in the direction of the electric drill pipe, so it can quickly punch holes in brittle cement concrete and stone materials. High-grade electric hammer can use the transfer switch to make the drill bit of the electric hammer in different working states, that is, only rotation without impact, only impact without rotation, both impact and rotation.