star drill
Noun: 1. A hand-powered drilling tool: A star drill is a type of manual drill used for creating holes in hard, brittle materials like stone, brick, or concrete. It consists of a steel rod with a star-shaped cutting point at one end. 2. A struck and rotated tool: The tool is operated by striking its end with a hammer while slightly rotating it between blows. This combined percussion and rotation action allows the fluted, star-shaped head to grind a hole into the material.
The term "star drill" specifically refers to the hand tool and its method of use. It is a compound noun where "star" describes the shape of the drill's cutting head.
Examples: * Before power tools were common, masons used a star drill and a heavy hammer to make holes for anchors. * The archaeologist carefully used a star drill to create a small hole in the rock sample. * You need to apply steady rotation with each hammer blow when using a star drill effectively.
- Historical/Contextual Usage: The star drill is often associated with traditional masonry, construction, and quarrying work before the widespread adoption of electric or pneumatic hammer drills. It may be discussed in historical contexts or for specialized applications where power is unavailable.
- Star chisel: A related hand tool with a similar star-shaped head but typically used more for cutting or splitting stone rather than drilling deep holes.
- Hammer drill / Rotary hammer: Modern power tools that perform a similar function (drilling into masonry) but use mechanical or electrical power to combine hammering and rotation.
- Masonry drill: A general term for any drill bit or tool designed to cut into stone, brick, or concrete.
- Hand drill (for masonry/stone): This is a more general term, but in the context of masonry, it often implies a tool like a star drill.
- Rock drill (manual type): Highlights the material it is designed to penetrate.
- Percussion drill (manual): Describes its primary operating mechanism (striking).
- To drill with a star drill: The action of using the tool.
- Example: They had to drill with a star drill for hours to set the foundation bolts.
- Star drill bit: While "star drill" usually refers to the entire tool, the cutting end itself can be called a bit or head.
- Example: The star drill bit was worn down and needed to be sharpened.
- The "star" in the name comes from the distinctive X-shaped pattern of the cutting edges, which resemble a four-pointed star when viewed head-on. This design helps to channel away dust and debris from the hole.
-
a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows
