Question

Why should you rotate the star drill after each blow of the hammer?

1. Rotating the drill prevents flat spots on the drill face.
2.Rotating the drill prevents the drill from blinding
3. Rotating the drill makes a smoother hole.
4. It is not necessary to rotate the drill unless it is installed in a rotary hammer drill motor

Answer 1

Rotating a star drill after each hammer blow is vital to prevent flat spots on the drill face, prevent the drill from binding, and to ensure a smoother hole is produced. It is a necessary manual technique even without a rotary hammer drill motor.

Step-by-step explanation:

When using a star drill, it is important to rotate the drill after each blow of the hammer for a few reasons. Firstly, rotating the drill helps to prevent flat spots on the drill face. This is crucial because flat spots can significantly reduce the effectiveness of the drill in chipping away at the material. Secondly, rotation prevents the drill from binding, which can occur if the drill becomes stuck in the same position within the material being drilled. Furthermore, continual rotation makes the resulting hole smoother, as the action creates a more uniform circumference, reducing irregularities in the drilled hole. Lastly, the suggestion that rotation is not necessary unless the drill is in a rotary hammer drill motor is incorrect in this context; manual rotation is a fundamental technique when using a hand-held star drill.