Page 225 - Demo

223DEEP HOLE DRILLINGNose AnglesStandard nose angles depend on the drill diameter (Figure 6.5.2.6).Figure 6.5.2.6D0.25xD30%u02da15%u02da30%u02da30%u02da40%u02da 35%u02daStandard sharpening for 0.9 to 4 mm drill diametersD30%u02da12%u02da20%u02da20%u02da30%u02da25%u02da12%u02da 0.3-0.50.25xDStandard sharpening for 4 to 32 mm drill diameters15%u00b0 20%u00b025%u00b0%u00d8Dh5D/4%u00b10,0512%u00b020%u00b00,3/0,512%u00b025%u00b020%u00b0Standard sharpening for 32 to 40 mm drill diametersNote: For special or semi-standard gundrills, special geometries will be offered to match the application.