What does RPM stand for when measuring drill speed?

When measuring drill speed, RPM stands for "Revolutions per minute." This term defines how many times the drill bit completes a full rotation in one minute. Understanding RPM is crucial for selecting the right speed for various drilling operations, as it affects the efficiency of the drilling process, the life of the drill bit, and the quality of the hole being drilled. Higher RPM values are typically used for softer materials, while lower RPM may be more suitable for harder materials to avoid overheating and premature wear.

Other terms, such as "Rotations per minute," might seem similar, but in the standard terminology of machining and drilling, "revolutions" is the term that is universally accepted and recognized in engineering contexts. The other options do not accurately describe the measurement commonly used in the context of drill speed.