What should be done before changing a drill bit?

Before changing a drill bit, it is essential to unplug the drill to eliminate the risk of accidental startup. This practice is a fundamental safety procedure that protects the user from potential injuries that could arise if the drill were to engage while the bit is being changed. Ensuring that the drill is not connected to power means the operator can work without the worry of being injured by a rotating bit or an unexpected activation of the drill.

While other actions, such as adjusting the drill speed and cleaning the drill area, are important for maintaining a safe and efficient work environment, they do not directly address the immediate safety concern associated with changing the bit. Inspecting the drill bit is also crucial for ensuring that the equipment is in good condition, but it should follow the safety protocol of disconnecting the power source first. Therefore, unplugging the drill is the most critical step before attempting to change a drill bit.