Milling refers to a machining process that involves the removal of material from a workpiece using rotary cutters. This skill encompasses the ability to operate milling machines and understand various milling techniques to shape and finish materials, typically metals and plastics. Knowledge of Milling is used to create precise components and parts for various applications, including manufacturing, engineering, and prototyping, by controlling factors such as speed, feed rate, and tool selection.

Milling Machines refer to machine tools used to shape, cut, and finish material by removing excess material with a rotating cutting tool. The skill involves understanding how to set up, adjust, and operate these machines to produce parts to required dimensions and surface quality. It is applied in manufacturing and fabrication work to create components, grooves, holes, and other precise features from metal, plastic, or other materials.

Numerical Controls refer to the automated systems that manage machine tools through programmed commands, enabling precise control of machining processes. This skill encompasses the understanding of programming languages and control systems that dictate the movement and operation of machinery. Knowledge of Numerical Controls is used to enhance manufacturing efficiency, improve product accuracy, and facilitate complex machining tasks by enabling the automation of repetitive processes.

Speeds and feeds refer to the parameters used to determine the optimal cutting parameters for machining operations such as milling, drilling, and turning. This requires a specialized skill as it involves an understanding of various factors such as the material being machined, the cutting tool's geometry, and the machine's capabilities. Effective use of speeds and feeds can result in improved efficiency, reduced wear and tear on equipment, and better quality parts.

Vertical milling is a machining process that involves the use of a specialized cutting tool called a milling cutter, which spins at high speeds and removes material from a workpiece held in place on a vertical milling machine. The process allows for the creation of complex shapes, slots, and holes with a high degree of accuracy and precision which makes it a specialized skill that requires training and experience to master. Vertical milling is used in a wide range of industries, including aerospace, automotive, and medical manufacturing.