Wire
Insert Hand Taps
Parallel fluted hand taps are the most commonly used type of wire
insert tap. The term 'hand tap' was originally applied to this type
as they were only suitable for hand tapping.
However, modern WTI hand taps, due to much improved manufacturing
techniques, are also suitable for machine tapping.
They provide close tolerance tapped holes in a variety of ferrous
and non-ferrous materials.
Available in three different styles they can be used individually
or in combinations dependant upon application.
Roughing Tap: Undersize in diameter, they provide a pre-prepared
tapped hole prior to finish or bottom tapping ensuring greater life
of second tap. They are particularly useful for course pitch threads
or for tough materials.
Finishing Tap: Provides full diameter thread and has 3.5 taper
leads - finishing taps are the most commonly used tap and are generally
used in a single operation.
Bottoming Tap: Provides full diameter thread to the bottom
of blind holes since the tap has only 1.5 lead threads.
Bottoming tap is usually used in conjunction with roughing tap.
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