We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
Size, material and tip type stamped on the shank.
Also known as: Bit size marking, Drill diameter marking
A drill bit's shank carries its diameter and often a material code, and the tip geometry rather than the marking says what it is for. A masonry bit's carbide tip and a wood bit's centre point are visible differences the size marking does not mention.
States a bit's diameter and often its material on the shank, in metric or imperial units.
Contexts: Technical drawing
Leaves the intended material to the visible tip geometry rather than to the marking, so a carbide-tipped masonry bit and a brad-point wood bit are told apart by shape.
Contexts: Technical drawing
A numeral with a unit stamped along the smooth shank of a spiral-fluted steel bit.