Answer :

Final answer:

The adjustable tool rest on a grinder should be positioned about one-eighth of an inch from the wheel to ensure safety and proper control. The precise positioning prevents any potential jams or impairments during operation.

Explanation:

The adjustable tool rest on a grinder should be positioned about one-eighth of an inch (0.125 inches) away from the wheel. This is essential in order to maintain safety and control while using the grinder.

This precise positioning is recommended to prevent the workpiece from being jammed between the wheel and the rest. If the gap is too wide, it can limit the control and effectiveness of grinding and in case of smaller gaps can lead to safety hazards such as wheel damage.

A well-positioned tool rest ensures that the workpiece is adequately supported and guided during the grinding process. This precision allows for controlled and accurate material removal, resulting in smoother and more even finishes on the workpiece. So, in addition to the safety aspect, maintaining the recommended one-eighth inch gap between the tool rest and the grinding wheel is a practical step to enhance the overall effectiveness and outcomes of grinding tasks, making it an essential practice in workshops and industrial settings.

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