🔍 Key Concepts

• Heat generation in metal cutting and what chip color tells you about temperature • Difference between cutting speed, feed, and depth of cut on a lathe • Effect of lubrication/cooling vs. cutting parameters on tool life and workpiece

💭 Think About

• What does a blue color on steel chips indicate about the temperature at the cutting edge? • Which lathe settings (speed, feed, depth of cut, tool height) most directly affect how much heat is generated in the cut? • If the chips are getting too hot, which adjustment would most directly reduce the cutting forces and chip thickness?

✅ Before You Answer

• Be clear on the difference between feed/depth of cut (how much material you remove per pass) and cross compound speed (how fast you move the tool across the work). • Consider whether changing tool height will significantly reduce chip temperature, or mainly affect surface finish and cutting geometry. • Ask: which option will most effectively lessen cutting load and heat at the tool–work interface, rather than just changing lubrication rate.