Before changing a drill bit or a saw blade, you should

Before changing a drill bit or a saw blade, you should

• A. Stop the machine and wait for it to stop spinning
• B. Unplug the tool from the outlet or source
• C. Apply lubricant to the blade
• D. Return the switch to on

Answer: (B)

Disconnecting power before changing blades or bits is a safety step that prevents the tool from starting unexpectedly while you’re handling sharp parts. By unplugging the tool (or removing the battery on cordless tools), you eliminate any chance of the motor or switch energizing, which greatly reduces the risk of serious injury as you insert or remove a bit or blade. Stopping the machine and waiting for it to stop doesn’t guarantee it won’t restart or that there isn’t residual energy, and returning the switch to on would invite an accidental startup. Lubricating the blade isn’t related to safe blade changes.

Disconnecting power before changing blades or bits is a safety step that prevents the tool from starting unexpectedly while you’re handling sharp parts. By unplugging the tool (or removing the battery on cordless tools), you eliminate any chance of the motor or switch energizing, which greatly reduces the risk of serious injury as you insert or remove a bit or blade. Stopping the machine and waiting for it to stop doesn’t guarantee it won’t restart or that there isn’t residual energy, and returning the switch to on would invite an accidental startup. Lubricating the blade isn’t related to safe blade changes.