The cutting speed in lathe work is defined as the

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Prepare for the Machinist Apprentice Level One Test. Utilize flashcards and multiple choice questions, complete with hints and explanations, to ensure readiness for your exam!

Multiple Choice

The cutting speed in lathe work is defined as the

Explanation:
Cutting speed is the speed at which the surface of the workpiece moves past the cutting edge—the tangential velocity of the workpiece surface at the point of contact. It’s expressed in surface units (like SFM or m/min) and depends on both the workpiece diameter and the spindle RPM (V = π D N with the appropriate unit conversions). This is different from the spindle RPM itself, and from how far the tool advances per revolution (feed per revolution) or how deep the cut is (depth of cut). The surface speed characterizes how fast the tool meets the material, which directly affects heat, wear, and chip formation.

Cutting speed is the speed at which the surface of the workpiece moves past the cutting edge—the tangential velocity of the workpiece surface at the point of contact. It’s expressed in surface units (like SFM or m/min) and depends on both the workpiece diameter and the spindle RPM (V = π D N with the appropriate unit conversions). This is different from the spindle RPM itself, and from how far the tool advances per revolution (feed per revolution) or how deep the cut is (depth of cut). The surface speed characterizes how fast the tool meets the material, which directly affects heat, wear, and chip formation.

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