How does a hammer drill work?

drill machine

How A Hammer Drill Works?

Percussion drills are suitable for drilling in all common materials, including plaster and masonry.

The rotational movement of a Handheld Power Drill is generated by the motor A and the gear B of the device – so far, the construction of this drill rather trivial. But what causes the power boosting blow?

The answer is a look inside a hammer drill. Here is located at the rear end of the drill spindle D – i.e. the axis that runs from the chuck in the unit – a tooth-studded disc C. This rotating in drilling operation toothed disc opposite sits a second toothed disc firmly in the housing of the percussion drill.

Percussion Drills Test

Impact drills are still the classics among power tools: we tested twelve units

How Does A Hammer Drill Work?

If, during drilling, the machine is pressed onto the material to be drilled, the two toothed disks are pressed against each other.

The attached to the rotating drill spindle while sliding on the fixed teeth of the rear sprocket again and again something forward fall in the tooth valleys then jerky back.

This effect increases the more the user presses the machine from behind. Due to the high rotational speed during drilling, this small mechanical process causes many small impacts.

Which only release a small impact energy – after all, the tooth height of the two discs is low. However, the method is sufficient to effectively treat common wall building materials.

Practical tip: However, if concrete is to be drilled, then it is better to use a hammer drill. With this type of machine, sharply stronger blows are triggered when drilling with a hydraulically driven metal mallet.