Forstner

Forstner is a type of drill bit designed for drilling straight holes in wood, metal, or other materials. It is named after its inventor, Johann Forstner, who patented the design in 1857. The Forstner bit is characterized by its unique shape, which consists of a cylindrical body with a series of helical flutes that extend from the cutting edge to the shank. This design allows the bit to drill straight holes without wandering or chipping the edges, making it ideal for applications such as drilling pilot holes, creating decorative patterns, and making precise holes for screws or dowels.

Forstner bits are available in various sizes and materials, including high-speed steel (HSS) and carbide. They are typically used with a drill press or a hand-held drill, and the drilling process involves applying downward pressure while rotating the bit. The helical flutes help to evacuate the drilled material, reducing the risk of clogging and ensuring a clean, precise hole.

In addition to its primary use in drilling, the Forstner bit can also be used for other purposes, such as creating decorative patterns in wood, making holes for screws or dowels, and drilling pilot holes for larger bits. Its unique design makes it a versatile tool for both professional and amateur woodworkers, as well as for metalworking and other applications.