Taper, Plug and Bottoming --
What is the big freakin’ difference?
The most common hand taps are called taper, plug, and bottoming.
look very similar with the only difference being the bevel angle at the tip (the
amount of threading on the tip).
Taper, Plug and Bottoming Compartive View
Taper, Plug and Bottoming are identical except for the bevel angle
at the tip. The bevel serves two purposes: it guides the tap into the hole and
it ramp cuts the undeveloped first threads.
have the longest bevel angle.
Plug taps are
the most common and have 3 to 5 undeveloped threads on the bevel.
taps have only 1 to 1 1/2 undeveloped threads at the tip and should be used
only when full amount of threads cannot be achieved by
the other two taps.
The number of
flutes and the geometry of the cutting edge will depend on the material tapped.
|Taper, Plug and Bottoming Compartive View|