🔍 Key Concepts

• Drill geometry – how equal cutting edge angles affect balance and cutting action • Hole size vs. cutting edge length – what makes a hole larger or smaller than the drill’s nominal size • Effect of uneven cutting edges – what happens if one lip cuts more than the other

💭 Think About

• Think about what happens if one cutting edge removes more material than the other. How would that affect the path and diameter of the hole? • If the drill wobbles or is pulled to one side because of uneven lips, would that tend to make the hole tighter or looser around the drill? • Consider which choice describes a gradual, typical result of poor grinding, rather than an extreme or immediate failure.

✅ Before You Answer

• Verify how unequal lip angles affect drill wandering and the effective cutting circle. • Eliminate options that describe conditions that are too sudden or absolute (for example, "will not" or "immediately") for a drill that is still basically sharp but just ground unevenly. • Recall that the final hole size is determined by the widest effective cutting path of the rotating drill.