Which OD operation cuts material from the end of a workpiece?

Which OD operation cuts material from the end of a workpiece?

• A. Facing
• B. Turning
• C. Knurling
• D. Parting

Answer: (A)

Facing is the operation that cuts material from the end of the workpiece to create a flat, square end perpendicular to the axis. On a lathe, the facing tool moves across the end face, removing a thin layer to true the end and set the length. This is different from turning, which removes material from the outer cylindrical surface along the length to reduce diameter or form shoulders; knurling, which adds texture on the outer diameter; and parting off, which uses a tool to cut through the stock to separate the piece, not primarily to finish the end surface. So the end-cutting operation is facing.

Facing is the operation that cuts material from the end of the workpiece to create a flat, square end perpendicular to the axis. On a lathe, the facing tool moves across the end face, removing a thin layer to true the end and set the length. This is different from turning, which removes material from the outer cylindrical surface along the length to reduce diameter or form shoulders; knurling, which adds texture on the outer diameter; and parting off, which uses a tool to cut through the stock to separate the piece, not primarily to finish the end surface. So the end-cutting operation is facing.