Threads, Taps, and Tapping
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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: Thread Designations Thread types, tolerances and the standard identification system explained including ISO Metric

2: Thread Tolerances Classes and fits of threads

3: Common Thread Standards Four thread geometries and formulas.

4: Tap Grinding Codes The precision of the tap grind

5: Tap Drill Sizes Formula examples used to determine tap drill size

6: Taper, Plug, and Bottoming and Pipe Taps How a series of different taps can work together. The special geometry of a pipe thread.

7: Machine Screw Taps Listing method of common screw taps by size More tap drill sizes.

8: Hand Tapping Tools The T-handle and the tap wrench

9: Hand Tapping Aids Special tools and helpers

10: Hand Tapping With a Drill Press Tips for successful drill press use

11: Hand Tapping Procedure Tips for Hand tapping.