Details of tools for drilling machines

BPERFORMING OPERATIONS TRANSPORTING B23Machine tools B23BTURNING BORING

B23B2251/00Details of tools for drilling machines

B23B2251/02Connections between shanks and removable cutting heads B23B2251/04Angles B23B2251/043Helix angles B23B2251/046Variable B23B2251/08Side or plan views of cutting edges B23B2251/082Curved cutting edges B23B2251/085Discontinuous or interrupted cutting edges B23B2251/087Cutting edges with a wave form B23B2251/12Cross sectional views of the cutting edges B23B2251/122Bevelled cutting edges B23B2251/125Rounded cutting edges B23B2251/127Sharp cutting edges B23B2251/14Configuration of the cutting part B23B2251/18Configuration of the drill point B23B2251/20Number of cutting edges B23B2251/201Single cutting edge B23B2251/202Three cutting edges B23B2251/204Four cutting edges B23B2251/205Five cutting edges B23B2251/207Six cutting edges B23B2251/208Eight cutting edges B23B2251/24Overall form of drilling tools B23B2251/241Cross sections of the diameter of the drill B23B2251/242increasing in a direction towards the shank from the tool tip B23B2251/244decreasing in a direction towards the shank from the tool tip B23B2251/245Variable cross sections B23B2251/247Drilling tools having a working portion at both ends of the shank B23B2251/248Drills in which the outer surface is of special form B23B2251/28Arrangement of teeth B23B2251/282Unequal spacing of cutting edges in the circumferential direction B23B2251/285Cutting teeth arranged at different heights B23B2251/287Cutting edges having different lengths B23B2251/40Flutes B23B2251/402with increasing depth in a direction towards the shank from the tool tip B23B2251/404with decreasing depth in a direction towards the shank from the tool tip B23B2251/406of special form not otherwise provided for B23B2251/408Spiral grooves B23B2251/42Types of drill B23B2251/422Deep hole drills B23B2251/424Gun drills B23B2251/426Micro-drills B23B2251/428Drills for cutting plugs of material B23B2251/44Margins B23B2251/443Double margin drills B23B2251/446Drills with variable margins B23B2251/46Drills having a centre free from cutting edges or with recessed cutting edges B23B2251/48Chip breakers B23B2251/50Drilling tools comprising cutting inserts B23B2251/505set at different heights B23B2251/52Depth indicators B23B2251/54Drilling tools having provision for drilling different diameters B23B2251/56Guiding pads B23B2251/58Guiding rolls B23B2251/60Drills with pilots B23B2251/603Detachable pilots B23B2251/606being a twist drill B23B2251/62Drilling tools having means to reinforce the shank B23B2251/64Drills operating in the reverse direction B23B2251/66Drills with provision to be used as a screwdriver B23B2251/68Drills with provision for suction B23B2251/70Drills with vibration suppressing means