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| Spiral Point Tap |
A spiral
point tap is a tap with an angled cutting face that pushes the metal chips ahead of the forming threads; resulting in less resistance
to thrust. They have
a shallower flute passage, giving them a more cross-sectional area. Consequently, they require less
torque and can be run at higher speeds. Spiral points
prevent thread damage by forcing chips ahead of the cutting action, reducing
chip loading in the flutes.
Commonly used for through holes.
Spiral Point Plug Chamfer Taps are ideally suited for tapping
deep through-holes in all but the most abrasive materials.
Bottom Chamfer Spiral Pointed
Taps tend to
form a tightly curled broken chip that is easily removed from a blind hole, provided
there is sufficient room at the bottom of the tap hole to accommodate the chip.
Spiral Point taps are not recommended
for use in blind holes. This is because the accumulation of chips can tend to
bind and break these taps more easily than others.
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