What should be done before changing the drill speed on a gear driven drill press?

Before changing the drill speed on a gear-driven drill press, it is essential to stop the press. This is a critical safety procedure as making speed changes while the machine is running can lead to several hazards, including the potential for injury due to unexpected movement of the drill bit or parts. Stopping the machine allows for a safe and controlled environment where the operator can adjust the gear settings without risk of moving parts causing accidents or damage.

Operating machinery while it is in motion can cause tools to bind, break, or even lead to false readings if adjustments are made during operation. Additionally, proper stopping procedures ensure that the operator has full control over the adjustments being made, significantly reducing the risk of mishaps.

Consulting the manual is good practice to ensure proper methods and maintenance guidelines are followed, but safety takes precedence over this step when it comes to operating the equipment.