Instrumentation Level One Module Two Section One

Front 1

A __________ is a tool used to cut female (internal) threads in materials

Back 1

Tap

Front 2

_________________ are used for starting all new threads.

Back 2

Taper taps

Front 3

_________ are used for tapping through holes.

Back 3

Plug taps

Front 4

_________________ are used for threading the bottom of a blind hole

Back 4

Bottoming or finishing taps

Front 5

After each use, clean the threads of the tap using __________________________________________

Back 5

A stiff wire brush and lightly oil the threads

Front 6

Describe about taps breaking off

Back 6

Taps are very hard and brittle, therefore they can be easily snapped off. When a tap breaks off in a hole, it is very difficult to remove. The main reason taps break are improper pilot hole sizes and cutting too many threads without removing metal chips.

Front 7

When tapping a blind hole, ________________

_____________________________________________

Back 7

You may need to use all three taps in the following order: taper, plug, and bottoming.

Front 8

The bottoming tap should only be necessary if the hole is _____.

Back 8

Blind

Front 9

Be sure to remove all ______________________

Back 9

Chips from the hole before using the bottoming tap.

Front 10

Dies are used to cut

Back 10

External threads on a pipe and round stocks.

Front 11

Make a slight __________ on the end of the workpiece using a flat file or a grinder.

Back 11

Bevel

Front 12

How do you use a die?

Back 12

Turn the die clockwise one full turn and reverse it one half turn to break chips loose. Continue threading the desired length of the rod. Use cutting oil frequently while threading. Use a proper container to capture the used oil so it can be recycled.

Front 13

Describe tap extractors

Back 13

Most tap extractors have 2 or 4 fingers that slip down into the flutes of a broken tap. Taps are often too hard to drill effectively, as a result tapered extractors are of little use. Tap extractors have an adjustable collar to support the fingers close to the broken tap. A wrench is fitted onto the extractor and turned counterclockwise to remove a standard tap. Tap extractors are made for different sizes of taps.