🔍 Key Concepts

• Difference between radius and diameter on a round work piece • What "depth of cut" means on a lathe tool (how far the tool moves in from the surface) • How a change in radius affects the overall diameter

💭 Think About

• When the tool moves inward by a certain amount, does that change just one side of the work piece or both sides? • If the radius changes by the depth of cut, how much does the diameter change? Twice that amount, the same amount, or half that amount? • Draw a circle and mark how the tool cuts from the outside to the inside—how many sides of the circle are affected on the finished diameter?

✅ Before You Answer

• Be clear on the relationship: Diameter = 2 × Radius • Confirm whether the depth of cut is a radial measure (in from the surface to the center) or a change in full diameter • Before picking an answer, multiply the depth of cut by the correct factor (1 or 2) based on your radius/diameter reasoning.