1. OBJECTIVES: M112 Cutting Tools
Use and understand the nomenclature of a cutting-tool point.
Explain rake and clearance angles
Identify various types of cutting-tool materials.

2. M112 Cutting Tools
CUTTING

3. Basic Qualities of Tool Materials
Strength
Hardness
Resistance to heat
Resistance to shock

4. Tool Materials Strength
Tensile
Compressive
Transverse Rupture

5. Tool Materials Hardness
Ability to resist penetration

6. Tool Materials Resistance to Heat
High speed steel vs. carbon steel
Red Hardness
carbides and ceramics vs. high speed steel

7. Tool Materials Resistance to Shock
High heat resistance = Low shock resistance

8. Cutting Tool Materials
Carbon Tool Steels
High Speed Steels
Carbide
Ceramics

9. Single Point Tools Cutting Edges & Relief Angles Nose Radius
Top Face, Flank, and End Face
Side & End Cutting Edge Angles
Rake Angles

10. Tool Wear
Flank Wear
Crater Wear
Built-up Edge

11. Review Q’s
What four [4] qualities should a cutting tool material have?
In what three [3] ways can the strength of a cutting tool be measured?
What is added to steel to create high-speed steel?
Why is high-speed steel superior to simple high-carbon steel?
Name three [3] common materials used to make cutting tools.
What is the purpose of a rake angle on a cutting tool?
What is the purpose of side and end clearances on a tool?

12. Questions?