Single Point Cutting Tool and its main Parts
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Single Point Cutting Tool

and

its main Parts 

Metal Cutting Tool ( Single Point Cutting Tool ) 

  • A single point cutting tool is mostly used on lathe , shaper and planer 

  • while a multi – point cutting tool is used on milling machine and broaching machine

  • A single point cutting tool may be either left or right hand cut tool depending upon the direction of feed . 

  • A right hand tool is shown in Fig . The following definition may be clearly understood 

(a) Shank

  • It is the main body of the tool

(b) Face

  • It is the surface on which the chip slides 

(c) Flank

  • It is the surface below and adjacent to the cutting edge 

(d) Heel :

  • It is the intersection of the flank and base of the tool 

(e) Nose :

  • It is the intersection of side cutting edge and end cutting edge .

(f) Cutting edge

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

single point cutting tool and its main 1763500054

(g) Lip angle 

  • It is the angle between the tool face and ground end surface of flank . 

  • The lip angle of a single point tool is usually 60 ° to 80 ° . 

(h) Cutting angle 

  • It is the angle between the face of the tool and a line tangent to the machined surface at the cutting point . 

(i) Rake angle 

  • The angle made by the face of the tool and the plane parallel to the base of the cutting tool . 

  • The strength of the tool depends upon this angle . 

  • The rake angle required to machine brass by high speed tool is 0 ° . 

  • Back rake angle : The angle by which the face of the tool is inclined towards back , is called back rake angle . 

  • Side rake angle : The angle by which the face of the tool is inclined towards side , is called side rake angle . 

    • It is provided on tools to control chip flow . 

  • The negative rake is usually provided on cemented carbide tools . 

(j) Side relief angle 

  • It is the angle between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of tool . 

(k) End relief angle 

  • It is the angle between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base .

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