In lathe terminology, the feed is expressed as the

• A. Travel per turn
• B. RPM
• C. Depth of cut
• D. Chip load

Answer: (A)

Feed is the distance the tool moves along the work for each revolution of the spindle. This is why it’s described as travel per turn—the axial advance per turn determines how quickly the cut progresses along the length of the piece. The spindle speed (RPM) sets how many times per minute the work rotates, but it doesn’t specify how far the tool travels in each rotation. Depth of cut refers to how deep the tool engages the material in a single pass, not how far it moves along the axis. Chip load is a term more commonly used in milling to describe how much material is removed by each cutting edge per pass, not the linear travel of turning. In practice, feed is often given as inches or millimeters per revolution, and you can multiply by RPM to get feed per minute for planning Machining time. For example, if the feed is 0.005 inch per revolution and the spindle runs at 200 RPM, the tool advances 0.005 × 200 = 1 inch per minute along the work.