Tool Bit Angle
1. Side Cutting Edge Angle:
The angle between side vanguard
and thus the side of the tool shank is known as side leading edge angle. It is
often mentioned because the lead angle.
2. End Cutting Edge Angle:
The angle between the highest
vanguard and a line perpendicular to the shank of the tool shank is known as
end leading edge angle.
3. Side Relief Angle:
The angle between the portion
of the side flank immediately below the side leading edge and a line
perpendicular to the bottom of the tool.
4. End Relief Angle:
The angle between the top flank
and therefore the line perpendicular to the bottom of the tool is named end
relief angle.
5. Back Rake Angle:
The angle between the face of
the tool and line perpendicular to the bottom of the tool measures on
perpendicular plane through the side leading edge . It is the angle which
measures the slope of the face of the tool from the nose, towards the rack. If
the slope is downward the nose it's negative back rake.
6. Side Rake Angle:
The angle between the face of
the tool and a line parallel to the bottom of the tool measured on plane perpendicular
to the bottom and therefore the side edge. It is the angle that measure the
slope of the tool face from the leading edge , if the slope is towards the
leading edge it's negative side rake angle and if the slope is faraway from the
leading edge , it's positive side rake angle. If there's no slope the side rake
angle is zero.
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