Should you always leave the chuck key in the chuck while drilling a hole?

Leaving the chuck key in the chuck while drilling is not recommended because it poses a significant safety hazard. When the chuck key is left in the chuck, there is a risk of it being inadvertently engaged while the drill is turned on, which can lead to serious injuries. The chuck key is designed to tighten or loosen the drill bit, and if it is accidentally activated while the drill is operating, it can become a projectile or cause the drill to malfunction. For optimal safety and to ensure proper operation, the chuck key should be removed and stored away from the drill immediately after use. This practice helps prevent accidents and promotes a safe working environment.