Wire
Insert Machine Taps
Spiral Point Taps: WTI spiral point taps have been designed
primarily for the machine tapping of through holes. A spiral point
is ground into the lead threads at an angle to the tap axis. This
produces a tap with initial left hand flutes having a progressive
cutting rake towards the point of the tap.
The swarf produced by this type of tap is pushed ahead of the tap
and falls free as it emerges through the hole, thus eliminating the
hazards caused by chips accumulating in the flutes during cutting.
This type of tap, due to its improved cutting action, is suited to
the tapping of precise deep holes in a single pass at very high peripheral
speeds.
Spiral Flute Taps: WTI spiral flute taps have helical flutes
that are ground in the same direction as the thread.
This feature directs the swarf back out of the hole and makes this
design of tap appropriate for the machining of blind holes particularly
in materials that produce a continuous chip.
Because they are designed for tapping of blind holes they are manufactured
with a bottoming chamfer lead.
|