angle back of the cutting edge of a broach tooth.
Back-of-tooth Radius-The radius on the back of
the tooth in the chip space/gullet.
cutting tool in various shapes, equipped with a series
of cutting teeth.
tooth without a cutting edge. A series of buttons is sometimes
placed after the cutting teeth of a broach, to produce
a smooth surface by material compression.
in the teeth of broaches which breaks up chips, facilitating
their removal. On round broaches they prevent the formation
of a solid ring in the chip gullet.
amount of thickness, length and width / circumference
of a chip.
between broach teeth which accommodates chips during cut.
Sometimes called the "chip gullet," it includes
the face angle, face angle radius, and back-of-tooth radius.
broach which cuts on the external surface of the workpiece.
of the cutting edge of a broach tooth. Sometimes called
the "hook" angle forms one part of the cutting
Face Angle Radius-The
radius just below the cutting edge that blends into the
back of tooth radius.
at the end of broach arranged at a constant size for finishing
guiding portion of a broach (usually internal) which serves
as a safety check to prevent overloading of the first
roughing tooth and correct axial alignment.
sometimes applied to "chip space."
of tooth or broach gullet from root to cutting edge.
sometimes applied to "face angle" of tooth.
which is pulled or pushed through a hole in the workpiece
to bring the hole to desired size and shape.
of the top of the broach tooth.
Land, Straight-A land having
no back-off angle, and used for finishing teeth to retain
broach size after a series of sharpenings.
Length to First Tooth-The
sum of pilot and pull shank length.
length of a broach.
from the cutting edge of one tooth to the corresponding
point on the next tooth.
that is pulled through or over the face of the workpiece.
end of the broach at which it is coupled to the puller
of the broaching machine.
Push Broach-A broach
that is pushed through or over the surface of the workpiece.
tool alignment as the final finishing teeth pass through
the workpiece hole. The rear pilot is slightly smaller
diameter than the finishing teeth.
Rise per Tooth-Progressive
increase in tooth height from tooth-to-tooth of a broach.
Usually greater in roughing teeth than in semifinishing
teeth. Action of step height produces the equivalent of
feed in other types of machining. Twice the chip per tooth
for round broaches.
teeth which take the first cuts in any broaching operation.
Generally they take heavier cuts than the semifinishing
teeth, just ahead of the finishing teeth, which take the
angle between the cutting edge of a shear tooth and a
line perpendicular to the broach axis or line of travel
on surface broaches.
Shear Cutting Tooth-Tooth
positioned at a sheer angle to the direction of broach
motion. Used on surface or external broaches, and cuts
with a shear action, with maximum tooth overlap.
external broach which cuts a flat or contoured surface.