Found 1 items, similar to Expanding drill.
English → English (gcide) Definition: Expanding drill Expanding \Ex*pand"ing\, a. That expands, or may be expanded; extending; spreading; enlarging. [1913 Webster] Expanding bit, Expanding drill (Mech.), a bit or drill made adjustable for holes of various sizes; one which can be expanded in diameter while boring. Expanding pulley (Mach.), a pulley so made, as in sections, that its diameter can be increased or diminished. [1913 Webster]