1. The document discusses three common cutting tools: single point cutting tool, twist drill bit cutting tool, and plain milling cutter cutting tool. 2. For each tool, it describes the main parts and provides diagrams labeling the parts. It also discusses the common angles associated with each tool type, such as back rake angle, side rake angle, and relief angles. 3. The document provides a detailed overview of the geometry and features of these basic cutting tools.

1. APPA
INSTITUTE OF ENGINEERING & TECHNOLOGY, KALABURAGI
DEPARTMENT OF MECHANICAL ENGINEERING
DATE: 20TH MARCH 2017
TIME: 8:00-10:00
CLASS: 4TH SEM “B”
1
By:
Asst.Prof. PRASHANT MULGE
B.E., M.Tech.,(Ph.D.)

2. 2
CONTENTS
1. Single point cutting tool
2. Parts of Single point cutting tool
3. Angles of Single point cutting tool
4. Twist drill bit cutting tool
5. Parts of Twist drill bit cutting tool
6. Angles of Twist drill bit cutting tool
7. Plain milling cutter cutting tool
8. Parts of Plain milling cutter cutting tool
9. Angles of Plain milling cutter cutting tool

3. 3
SINGLE POINT
CUTTING TOOL
TWIST DRILL
BIT
PLAIN MILLING
CUTTER

5. 5

6. 6
1. SHANK
2. FACE
3. CUTTING EDGE
a] End cutting edge
b] Side cutting edge
4. FLANK
5. NOSE
6. NOSE RADIUS

7. 7
SHANK: It is the main part of the cutting tool, and is
also the part of the tool is gipped in the tool holder.
FACE: It is the top portion or surface of the tool over
which the chip flows during the cutting.
CUTTING EDGE: Cutting edge is the portion of the
face edge that separates the chip from the
workpiece.
END CUTTING EDGE: It is the cutting edge formed at the end face of the tool.
SIDE CUTTING EDGE: It is the cutting edge on the side face of the tool.
FLANK: It is the surface adjacent to, and below the cutting edge when tool lies in a
horizontal position.
NOSE: It is the tip of the cutting tool, and formed by the intersection of the side cutting
edge and the end cutting edge.

8. 8
1. BACK RAKE ANGLE = 100
2. SIDE RAKE ANGLE = 90
3. END RELIEF ANGLE = 60
4. SIDE RELIEF ANGLE = 50
5. END CUTTING EDGE ANGLE = 80
6. SIDE CUTTING EDGE ANGLE = 70
7. NOSE RADIUS = 2 mm
TOOL SIGNATURE: 10,9,6,5,8,7,2mm

9. 9
BACK RAKE ANGLE: It measurers the
downward slope of the top surface of the tool
from the nose to the rear along the z axis.
SIDE RAKE ANGLE: It measures the slope of
the top Surface of the tool to the side in a
direction Perpendicular to the z-axis.
SIDE CUTTING EDGE ANGLE: It is the angle
between the
Side cutting edge and the z-axis of the tool.
SIDE RELIEF ANGLE: It is the angle made by
the flank Of the tool and a plane
perpendicular to the base just under the side
cutting edge.
END CUTTING EDGE ANGLE: It is the angle
between the end cutting edge and a line
perpendicular to the Tool shank.
END RELIEF ANGLE: It is the angle between a
plane Perpendicular to the base and the
flank of the tool.

10. 10

11. 1. SHANK
2. BODY
3. POINT
4. LIPS
5. FACE
6. FLANK
7. LAND OR MARGIN
8. WEB
9. CHISEL EDGE
10.BODY CLEARANCE
11.AXIS
12.HELIX ANGLE
13.POINT ANGLE
14.LIP RELIEF ANGLE
15.CHISEL EDGE ANGLE
16.NECK

12. 1. SHANK: The shank is the portion of the drill bit which is held and driven.
2. BODY: The body is the portion of drill bit that forms the main cutting unit.
3. POINT: The point is the cutting end of the drill bit. It is a cone shaped surface consisting of
lips, faces, flanks and chisel edge
4. LIPS: The lips are the primary cutting edges of the drill extending from the chisel point to
the periphery of the drill.
5. FACE: The curved surface of the flute near the lip is called face.
6. FLANK: It is the conical surface of the drill point, which extends behind the lip to the
following flute.
7. LAND: It is a narrow flat surface which runs all along the flutes of the drill on its leading
edges.
8. WEB: The web is the central portion of the drill body that connects the lands.
9. CHISEL EDGE: It is the short edge ground on the tool point along the web.

13. 1. HELIX ANGLE: It is the angle between the leading edge of the land and the axis of the drill bit.
(16-320)
2. POINT ANGLE: The angle between the drill lips is called the point or cutting angle.(80-1400)
3. LIP RELIEF ANGLE: it is the axial relief angle at the outer corner of the lip and varies from
8-150
4. CHISEL EDGE ANGLE: It is the angle between the lip and the chisel edge, as seen from the end
of the drill (130-1450)

15. 1. BODY
2. CUTTING EDGE
3. FLUTE
4. FILLET
5. TOOTH
6. FACE
7. LAND
8. OUTSIDE DIAMETER
9. ROOT DIAMETER
10.HOLE DIAMETER
11.CLEARANCE ANGLE
1. PRIMARY CLEARANCE ANGLE
2. SECONDARY CLEARANCE ANGLE
12.RELIEF ANGLE
13.RAKE ANGLE

16.  BODY: The body is the solid portion left in
blank after forming the cutting teeth and the
arbor hole.
 CUTTING EDGE: The peripheral cutting
edge is the intersection of the face of the
tooth with the leading edge of the land. It is
the edge that removes metal from the
workpiece.
 FLUTE: It is the space between the back of
one tooth and the face of the following tooth.
 FILLET: The flute is the curved portion at
the bottom of the flute, provided to allow
chip flow and chip curling.
 TOOTH: The tooth is the part of the cutter starting at the body and ending at the peripheral cutting edge.
 FACE: The tooth face is the surface of the tooth between the fillet and the cutting edge.
 LAND: The land is the portion behind the cutting edge on each tooth that is relieved to avoid interference
between itself and the surface being machined.
 OUTSIDE DIAMETER: It is the diameter of the circle passing through the peripheral cutting edges.
 ROOT DIAMETER: It is the diameter of the circle passing tangent to the bottom of the fillet of the teeth.
 HOLE DIAMETER: The hole diameter determines the size of the arbor necessary to mount the milling
cutter.

17. 1. PRIMARY CLEARANCE ANGLE:
It is the angle formed by the back
of the tooth with a line drawn tangent
through the periphery cutting edge.
2. SECONDARY CLEARANCE ANGLE:
It is the angle formed by the
secondary clearance surface of the tooth
and a line drawn tangent through the
periphery cutting edge.
3. RELIEF ANGLE: It is the angle measured between the land and the tangent drawn to the
periphery cutting edge.
4. RAKE ANGLE: It is the angle measured between the tooth face and the center line of the cutter.