How close should the tool rest be adjusted when using a bench grinder?

The correct adjustment for the tool rest on a bench grinder is typically set to about 1/8 inch from the grinding wheel. This distance is important for several reasons. First, maintaining this close proximity helps prevent the workpiece from getting caught in the grinder, which can cause dangerous kickback or the tool to bind. Additionally, this distance allows for optimal support of the workpiece, facilitating better control and accuracy while grinding.

A tool rest that is too far away can impede the effectiveness of the grinder by allowing more movement, which can lead to an uneven or unsafe grinding process. Conversely, a rest that is set too close may lead to excessive wear on both the tool rest and the grinding wheel, resulting in a shorter lifespan for the equipment and potentially dangerous conditions if the grinding wheel becomes overloaded. Hence, an 1/8 inch setting strikes a balance between safety and effectiveness, ensuring proper function during operation.