What is a recommended precaution when using a bench grinder?

Using a bench grinder necessitates careful attention to safety, and ensuring that guards cover most of the wheel is a crucial precaution. Guards are safety devices designed to protect the user from flying debris and harmful sparks generated during grinding operations. They help contain pieces of the grinding wheel should it break and prevent contact with moving parts, significantly reducing the risk of injury.

The design of these guards is intended to provide maximum coverage without obstructing the user's ability to work effectively. By ensuring that guards are properly positioned, the user minimizes exposure to potential hazards caused by grinding dust and flying fragments.

In contrast, grinding on the side of the wheel can lead to dangerous situations, as not all grinding wheels are designed for use that way, which can result in wheel failure. Additionally, adjusting the work rest to a clearance greater than recommended or wearing gloves can create unsafe conditions, as gloves may catch in the wheel, and too large a gap in the work rest can lead to loss of control of the workpiece.