Definition

Noun: A milling machine is a machine tool in which a workpiece (often metal) is secured to a table or carriage and is then moved against a rotating cutting tool. The cutter shapes the material by removing chips from it.

Usage

A milling machine is used for machining solid materials, primarily metals, to produce complex shapes, slots, holes, and surfaces. The workpiece is typically held stationary in a vise or clamped directly to the machine table, which can move in multiple directions (e.g., X, Y, and Z axes) to feed the material into the spinning cutter.

Examples

• The machinist used a milling machine to create the precise gear teeth.
• This part requires a milling machine for its flat surfaces and intricate grooves.
• Modern CNC (Computer Numerical Control) milling machines can produce highly complex components automatically.

Advanced Usage

• CNC Milling Machine: A milling machine controlled by a computer, which follows a programmed set of instructions to machine the part.
• Vertical Milling Machine: A common type where the spindle axis (holding the cutter) is vertically oriented.
• Horizontal Milling Machine: A type where the spindle axis is horizontally oriented, often used for heavier cuts or certain types of gear cutting.

Variants and Related Words

• Mill (verb): To machine a material using a milling machine. (e.g., "We need to mill this block of aluminum.")
• Milling (noun): The process or operation of using a milling machine. (e.g., "The milling was completed in two hours.")
• Miller (noun, archaic/informal): A person who operates a milling machine.

Synonyms

• Machine tool (this is the broader category; a milling machine is a specific type of machine tool)
• Mill (informal, as in "Put it on the mill.")

Related Phrases/Idioms

• To run a milling operation: To perform machining using a milling machine.
• Set up the mill: To prepare the milling machine for a specific job, including installing cutters and securing the workpiece.

Noun

1. machine tool in which metal that is secured to a carriage is fed against rotating cutters that shape it