Cutting Tools II
Use and abuse of twist drills; Sharpening twist drill bits; Using a grinding chart; Grinding wheels—how they work, their construction, and their markings; Mounting a grinding wheel; Proper dressing and conditions that prevent free cutting.
Lesson 1: The Use and Abuse of Twist Drills
Topics
The Uses of Drills; The Parts of a Drill; Drill-Holders; Drill Sizes; The Core Drill; Cutting Angles on Drill
Lesson 2: Sharpening Twist Drills
Topics
Sharpening a Drill Bit; The Drill Point and Clearance Angles; Grinding the Drill by Hand; The Drill Grinding Machine; Drill Grinding Chart
Lesson 3: Grinding Wheels
Topics
Grinding Machines; How a Grinder Works; Grinding Wheel Construction; Grinding Wheel Marking; How to Mount a Grinding Wheel; Dressing a Grinding Wheel; Condition Which Prevent a Wheel from Cutting Freely