🔍 Key Concepts

• Friction and heat generated between the blade and metal during cutting • How lubrication and cooling affect cutting tools • Common reasons why saw blades fail or wear out in metal-cutting operations

💭 Think About

• When metal is cut without coolant, what physical effect happens first at the cutting edge of the blade? • Which of these options describes something that coolant directly reduces: temperature, mechanical misalignment, or chip formation on the cut surface? • Think about what would most quickly damage or dull a power hacksaw blade if you ran it dry on metal.

✅ Before You Answer

• Compare which option is most directly linked to temperature control. • Ask yourself which problem is most commonly solved by adding coolant or cutting oil in machining and sawing operations. • Eliminate any choices that describe problems caused mainly by operator error or poor setup, not by lack of coolant.