Answer :

Final answer:

The RPM ratings of a grinding wheel and a grinder must match to ensure safety, efficiency, and optimal performance. Different RPM ratings can lead to excessive energy conversion and potential hazards. Additionally, the RPM affects the rotational kinetic energy, which is essential for the grinding process.

Explanation:

The RPM (Rotations Per Minute) rating of a grinding wheel must match that of the grinder for safety and efficiency reasons. The RPM rating indicates rotational kinetic energy, which is the energy a body accumulates due to its rotational motion. A mismatch in the RPM ratings between the grinding wheel and the grinder could cause excessive vibration, sparks, and potentially be a hazard.

Rotational kinetic energy is converted into heat, light, sound, and vibration when a grinding wheel is in operation, as seen in Figure 10.14 and Figure 10.17. If a grinding wheel with a different RPM rating is used, it can lead to excessive energy conversion leading to more heat, light, sound, and vibration—this can lead to early wear and tear of the tool, inefficient operation, and potential safety issues.

As Figure 8.6 notes, the work done by a grinding wheel is dependent on its rotation - essentially, the number of rotations it makes plays a critical role in the grinding process. Using a grinding wheel that matches the grinder's RPM ensures optimal performance and the safety of the operator.

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