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Topics: Milling cutter, Drill bit, Machining Pages: 48 (7437 words) Published: October 14, 2014
Technological University of the Philippines
College of Industrial Technology
Mechanical Engineering Technology Department


Prof.Josephine Alden

Cutting Tools Design

Page 1

Table of Contents
Single Point Cutting Tools


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Alfafara, Adrian


Reporters: Illustrisimo, Rocky
Gulapa, Karl Yshmael

Twist Drills

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Enriquez, Jommel

Milling Cutters


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Molabola, Mark Wilson
Silverio, John Paul


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Lunzaga, Mark


Reporters: Rodriguez, Jairo
Molina, Vladimir
Ortiz, Kevan Emmanuel
Dulot Michael


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Ng, Mark Harisson


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De Chavez, Rodney
De Belen, Michelle

Cutting Tools Design

Page 2

Single Point Cutting Tools
A. Definition

It has only one cutting point or edge.
Used for turning, boring, shaping or planning operations.
These tools used on lathe, boring and shaper machine

B. Geometry

Terminology of single point cutting tool

Shank – the main body of the tool and used to grip in tool holder.

Flank- the surface below or adjacent to cutting edge.

Face – the top surface along which the chips moves or slide.

Heel – the intersection of the flank and base of the tool. It is curved portion at the bottom of the tool.

Nose – It is the point where slide cutting edge and base cutting edge intersect.

Base – a bearing surface of the tool when it is held in tool holder or clamped directly in the tool post.

Cutting Tools Design

Page 3

Cutting edge – It is the edge on face of the tool which removes the material from work piece.

Nose radius – It provide long life and good surface finish sharp point on nose highly stressed, and leaves grooves in the path of cut.

Tool Angle – Tool angle have great importance. The tool with proper angle, reduce breaking of tool, cut metal more efficiently, generate less heat.

Cs - Side Cutting Edge Angle
e- Side relief Angle
Ce- End Cutting Edge Angle
b- Back Rake Angle
s- Side relief Angle

Side Cutting Edge Angle (Cs): It is the angle between the side cutting edge and side of tool shank. The complementary angle of Side Cutting Edge Angle is called ‘Approach angle’.
End Cutting Edge Angle (Ce): It is the angle between end cutting edge and line normal to shank.
Side Relief Angle ( s): It is the angle between portion of side flank immediately below the side cutting edge and a line perpendicular to the base of the tool. End Relief Angle ( e): It is the angle between portion of the end flank immediately below the end cutting edge and a line perpendicular to base of tool.

Cutting Tools Design

Page 4

Back Rake Angle ( b): It is the angle between face of tool and line parallel to the base of tool measured in a plane perpendicular to side cutting edge. This is positive if the side cutting edge slopes downwards from the point towards the shank and is negative if the slope of side cutting edge is reverse. So, this angle gives the slope of the face of the tool from the nose towards the shank.

Side Rake Angle ( s): It is the angle between the face of the tool and a line parallel to base of tool and measured in a plane perpendicular to the base and the side cutting edge.
The side rake is negative if the slope is towards the cutting edge and positive if the slope is away from the cutting edge. This angle gives the slope of face from the cutting edge.
C. Types according to shape
1. Right Hand - If viewed behind the tool down the length of the tool holder, at tool designed to cut from left to right.
2. Left hand - A cutter whose flutes twist in clockwise direction. 3. Straight Round nose - A carbide cutting tools (also called as lathe tools ) are used as metal cutting tools in machine shops for...
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