Basics of the CNC Mill

Provided by: ToolingU

“Basics of the CNC Mill” explains the components and function of CNC mills. A CNC mill produces flat or curved surfaces on square or rectangular workpieces. CNC mills may have a vertical spindle or a horizontal spindle and either their table or cutting tool may move to execute a cutting operation. CNC mills use a variety of tools, which are kept in the toolchanger on a toolholder, to perform different cutting operations. The spindle grabs the toolholder and secures it. On the worktable, vises or fixtures may secure workpieces during machining. The CNC mill can perform multiple operations in the same setup. It is essential for a CNC mill operator to be familiar with machine basics prior to executing any cutting operation. A trained operator can use a CNC mill to create precise parts safely and consistently. After taking this class, users should be able to describe the general machine components of a CNC mill and their basic function.

Course Objectives:

  • Describe the mill
  • Distinguish between the two types of CNC mills
  • Identify components of the CNC mill
  • Explain how the CNC mill moves to cut workpieces
  • Identify the three primary cutting variables
  • Describe common milling cutters
  • Describe common milling operations
  • Describe the capabilities of a CNC machining center
  • Describe cutting tool materials for the CNC mill
  • Identify components of a standard toolholder used on the CNC mill
  • Describe the purpose of a toolchanger on the CNC mill
  • Describe workholders used on the CNC mill.

Recommended Background

  • Recommended for all manufacturing personnel operating CNC machines.

Course ID







Communication, Critical Thinking, Personal Effectiveness, CNC Milling Basics, CNC Mill Components

Method of Delivery


Estimated Effort

2.5 hrs



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