Wiktionary(1.50 / 4 votes)Rate this definition: 1  dilemma(Noun) A circumstance in which a choice must be made between two or more alternatives that seem equally undesirable. 2  dilemma(Noun) (disputed) A difficult circumstance or problem.
The lathe is an ancient tool, dating at least to ancient Egypt and known to be used in Assyria and ancient Greece. The lathe was very important to the Industrial Revolution. It is known as the mother of machine tools, as it was the first machine tool that lead to the invention of other machine tools.
Answer A lathe chuck is a device on the driven spindle on the head (headstock) of the machine that holds the workpiece. It grips and spins it. The chuck has fingers called jaws that pinch the workpiece between them to secure it. Chucks can be 2-, 3- , 4-jaw or more.