Boucharde (bush hammer)

BOUCHARDE (BUSH HAMMER) (EN: boucharde; DE: Stockhammer, Stockeisen; FR: boucharde; ES: bujarda, bucharda; RU: бучарда) is the tool in the form of the steel hammer with the serrated working surface, which is purposed for the percussive processing of the stone using the method of the chipping.

The boucharde initially (since the start of the 19th century) was used as the manual tool during the stone-hewing and sculptural works; it is used within the stone-processing production in combination with the jackhammer, as the working body of the boucharde machine tools. According to the shape and arrangement of the teeth, the bouchardes are sub-divided into hammer-shaped and cross-shaped. They create by the hammer-shaped boucharde the grooved textures of the chipping on the surface of the stone. They perform by the cross-shaped boucharde the precise percussive processing of the stone according to the shape, and also create the point-shaped textures. The main parameters of the processing are: the frequency of the hits is 1200-1800 per minute; the energy of the single hit is 25-45 joules.