What are the Mechanical Differences Between Impact Drill and Rotary Hammer?

- Jun 05, 2018 -

The main fixture and drill handle are different in impact force due to different working modes. As a result of the greater shock of the shock force, the rotary hammer is used as an auxiliary handle with a special square head or a circular head with a slot with a groove, rather than a universal three clawed drill clamp on the drill. Because the clamping chuck is clamped without clamping, there is no reason for loosening due to vibration. Because of the different impact force, the electric hammer can play deeper and larger and can work on harder plastids.


First, we need to know the following questions: 

1, when do we need to use percussion drill? 

2. When do you need to use an electric hammer? 

When it comes to the need to drill holes in the cement wall, it is necessary to use a percussion drill. When it comes to the need to drill a hard structure such as reinforced concrete, an electric hammer is needed.

First, the difference between a common drill, a percussion drill, an electric hammer, and why a common drill can not drill a wall, and a punching drill and an electric hammer. An ordinary drill is drilled into the object by the rotation of the bit, and the impact drill and the electric hammer add an axial motion on this basis, and the bit moves in the axis synchronously when it rotates, thus more forcefully drilling into the hard object. The difference between percussive drill and electric hammer is mainly due to the difference in force structure. Generally speaking, the percussion drill depends on a group of impact gears that produce friction before and after movement, while the electric hammer relies on the reciprocating motion of the cylinder compressed reciprocating. The impact of these two structures is greater. In the way of operation, the percussion drill needs the user's force to produce impact, and the electric hammer can produce impact force without force.

Let's check the interior of a impact drill

impact drill working principle.gif

And the interior of a rotary hammer

rotary hammer working principle.gif

The advantage of the percussion drill is that it can not only punch holes in non reinforced concrete, but also tighten screws and install furniture when necessary.


The electric hammer can easily drill through the wall of the copper wall.


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