Bit for cutting drywall

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 51/00 (2006.01) B23B 51/02 (2006.01) B27C 1/00 (2006.01) B27G 13/00 (2006.01) B27G 13/02 (2006.01) E04F 21/00 (2006.01) E04G 23/02 (2006.01)

Patent

CA 2418560

A drywall routing bit for cutting laterally in a drywall or sheetrock panel includes an elongated body terminating at one end in a tip for penetrating the panel. The bit includes a single helical flute which defines a cutting edge at a helix angle relative to said longitudinal axis of the bit of 36°- 38°. The cutting edge of the flute is defined at a rake angle of 20°-26°. The fluted portion of the bit has a web thickness that is 60%-63% of the bit outer diameter, for a 1/8" diameter bit. The tip of the bit includes angled chisel edges subtending an angle of 113°-123° and following a shallow S-shaped curvature relative to a plane including the subtended angle.

Outil de toupillage de cloison sèche pour couper latéralement une cloison sèche ou un panneau Sheetrock. L'outil comprend un corps allongé à une extrémité d'un outil pour pénétrer le panneau. L'outil comprend une cannelure hélicoïdale qui définit une trousse coupante à un angle d'hélice par rapport à l'axe longitudinal de l'outil, variant entre 36- 38 degrés. La trousse coupante de la cannelure est définie à un angle de pente de 20-26 degrés. La partie cannelée de l'outil a une épaisseur de réseau qui correspond à 60-63 % du diamètre externe de l'outil, pour un outil de 1/8" diamètre. Le bout de l'outil comporte des arêtes transversales anglées sous-tendant un angle de 113.-123.degrés et suivant une courbure concave en S par rapport à un plan,, incluant l'angle sous-tendu.

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