🔍 Key Concepts

• Lathe centers and how work is normally supported between them • The purpose and function of a lathe dog • How a chuck holds irregular or short workpieces

💭 Think About

• Ask yourself: when a workpiece is too short, irregular, or otherwise cannot be supported by centers at both ends, what device on a lathe is typically used to grip it directly? • Which option is specifically designed to clamp and rotate the work by gripping its outside (or inside) surface, rather than driving it between centers? • Which items in the choices are parts or accessories used with centers, and which are used instead of centers?

✅ Before You Answer

• Identify which choice is primarily used to drive work that IS between centers (not what the question is asking about). • Identify which choice is a rotating holding device mounted on the spindle nose to grip the workpiece itself. • Make sure the device you pick is suitable for work that cannot readily be mounted between centers, such as short or irregularly shaped pieces.