Twist drill for dry boring

Details Twist drill for dry boring Twist drill for dry boring

B - Operations, Transporting

23

B

B23B 51/02 (2006.01)

Patent

CA 2295224

The invention relates to a drill used for dry drilling, characterized by the asymmetry of those cutting edge parts only whose faces are in the drill core (8) area, in particular its entire chisel edge (9). This asymmetry can result from the fact that individual chisel edges (11, 12) have different lengths. For example, the different lengths of the individual chisel edges (11, 12) are indicated by the dimensions (A) and (B).

Foret pour perçage à sec, caractérisé par l'asymétrie uniquement des parties de son tranchant dont les faces de coupe sont situées dans la zone du centre du foret (8), en particulier de la totalité de son arête transversale (9). Cette asymétrie peut être obtenue au moyen d'arêtes transversales individuelles de différentes longueurs (11, 12). Les longueurs différentes, par exemple, des arêtes transversales individuelles (11, 12) sont désignées par les dimensions (A) et (B).

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