How to use Taps and die sets in engineering .CMM2

What is tap and die used for in Engineering 

A tap and die are use for cutting threads in or onto a piece of metal

TAP

When would you use a tap for a thread 

You would use a tap for a internal thread inside of a hole

Does the hole need to be bigger or smaller , explain why .

When tapping a thread the hole that is being tapped needs to be smaller than the tap because when tapping  material is being removed from the inside of the hole forming the thread

METRIC TAPPING THREAD CHART.

What are the different types of tap ( taper, intermediate, bottoming) explain the difference between them 

a taper tap is a tap that is tapered so that you can ease in to cutting the threads.

a Bottoming tap has next to no taper because it is designed to thread all the way to the bottom of the tap

a intermediate tap has between 3-5 tapered threads that is more than a bottoming tap and less than a taper tap

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Die

When would you use a Die for a thread 

you would use a die for making the external part of the thread

Does the Bar need to be bigger or smaller , explain why .

The Bar has to be larger than the die because you are cutting in to the bar and not add material to the outside of the bar.

some die's you can use on a lathe and some that you have to turn by hand