Features of Milling Cutters

Some of the terms used to identify the major features of a milling cutter are given in the figure.

(Olivo C.T., Machine Tool Technology and Manufacturing Processes, C Thomas Olivo and Associates)



The following features are are described by these terms:
  • Outside diameter
  • Cutter width (measurement across the face)
  • Hole size
  • Keyway (to match the arbor keyseat)
  • Shank (straight or tapered)
  • Cutter teeth


    Circular milling cutter s are designed with three basic forms of teeth:
  • Standard tooth
  • Formed tooth
  • Inserted tooth

    Standard Tooth Form

    (Olivo C.T., Machine Tool Technology and Manufacturing Processes, C Thomas Olivo and Associates)

    Some of the common design features for the standard tooth form are illustrated in the figure.

  • The teeth are said to be radial when each tooth face lies along a line that cuts through the center of the cutter. Teeth are cut either with a radial tooth face or at zero degree, positive or negative rake angle to the radial line.
  • There may be two or three clearnces on the standard tooth form. The teeth are ground at a slight clearance angle (primary clearance) around the periphery. This clearance extends from the tooth surface and produces a cutting edge.
  • The narrow, flat surfacedirectly behind the cutting edge is called the land.
  • The angle formed by the cutting edge and the land is called the tooth angle. The body of the tooth is cut with a secondary angle and a third angle.



    Formed Tooth Milling Cutter

    A formed tooth milling cutter has a contour, or tooth outline, of a particular shape. A concave milling cutter with a specific diameter produces a rounded shape. A gear cutter machines a gear tooth that conforms to specific design requirements.

    Inserted Cutter


    A face milling cutter with inserts






    Go to the MILLING EQUIPMENT PAGE

    If you have any questions about this page,
    contact Kannan Narayanan (knarayan@mtu.edu)