🔍 Key Concepts

• lathe operations used on round stock (turning, facing, threading, knurling) • The purpose of a roughened checkered surface on a cylindrical part (for grip, not for cutting or sealing) • Difference between cutting tools (like threading/chamfering) and forming tools that displace metal on the surface

💭 Think About

• Which tool is commonly used on a lathe to create a non-smooth, gripping pattern on round shafts such as tool handles, knobs, or handwheels? • Do threading and chamfering tools generally make continuous helical or angled cuts, or do they raise a cross-hatched pattern over the surface? • What kind of tool produces a pattern that looks like small diamonds or checkers around the circumference of the workpiece?

✅ Before You Answer

• Match the phrase "roughened checkered surface" to the common machine-shop term for that surface pattern • Identify which choice is specifically associated with improving grip on round parts rather than shaping edges or cutting screw threads • Confirm that the correct tool is standard equipment on a lathe used for producing decorative or gripping patterns on cylindrical workpieces