Countersinking, Counterboring, and Spotfacing
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.

1: Overview What are these process used for?

2: Countersinking For flat head screws

3: Counterboring For cap screws

4: Spotfacing On irregular surfaces

label:Counter sinking, counter boring, spot facing