noun
chuck
A device that holds a tool or workpiece in a drill or lathe.
The chuck holds the drill bit firmly as it spins.
Etymology
The word is related to chock, a block or wedge used to secure something. In machinery, the securing function became a device gripping a tool or workpiece.
More examples
- She tightens the drill's chuck with a small key.
- The lathe's chuck grips the metal rod during cutting.
- Keyless chucks let you change bits without a separate tool.
Forms
chuck · chucks
Similar words
- collet
- Grips tools with a split sleeve rather than separate jaws.