Drill type introduction, knowledge points are here! _ and other materials

Drill type introduction, knowledge points are here! _ and other materials


Original title Introduction to drill bit types knowledge points are all here! Drill bit is a kind of rotary tool with cutting ability at the head end It is generally made of carbon steel SK or high-speed steel SKH2 SKH3 and other materials by milling or rolling and then grinding after quenching heat treatment It is used for drilling on metal or other materials It has a wide range of applications and can be mining dth bit used in drilling machines lathes milling machines electric hand drills and other machine tools Drill bits can be divided into the following types according to different types A Classification by structure 1 Integral drill bit the drill top drill body and drill shank are made of the same material 2 End welding drill bit the drill top is welded by carbide B Classification by drill 1 Straight shank drill bit when the diameter of the drill bit is less than 130mm the straight shank shall be used 2 Taper-shank drill bit The drill bit shank is tapered and generally its taper is Morse taper C Classification by use Expand the full text 1 Center bit It is generally used to drill the center point before drilling and the front conical surface is 60 ° 75 ° 90 ° etc 2 Twist drill bit the most widely used drill bit in industrial manufacturing 3 Superhard drill bit The front end of the drill body or all of it is made of superhard alloy tool material which is used for drilling and processing materials 4 Oil hole drill bit There are two small holes in the drill body through which the cutting agent reaches the cutting edge to take away heat and chips With this drill bit the working object rotates while the drill bit is stationary 5 Deep-hole drill bit It was Tapered Rock Bit first used for the drilling of gun barrels and stone barrels also known as gun barrel drill bit The deep-hole drill is of the straight flute type which cuts off a quarter of the strong part in the round tube to produce chip removal at the cutting edge 6 Drill bit and reamer the front end is the drill bit and the rear end is the reamer The difference between the diameter of the drill bit and the diameter of the reamer is only the allowance for reaming Some drill bits are used in combination with screw tapping so they are also called mixed drill bits 7 Taper drill a taper drill can be used when machining the feed inlet of the mold 8 Cylindrical hole drill bit


We call it a countersunk milling cutter The part with smaller diameter at the front end of this kind of drill bit is called the lead rod 9 Taper hole drill It is used for drilling taper holes and its front end angle is 90 ° 60 ° etc The chamfering tool we use is one of the conical hole drills 10 Triangular drill bit a drill bit used in an electric drill the shank of which is made into a triangular surface so that the Chuck can firmly fix the drill bit Drill bit material selection criteria The drilling operation is essentially a cutting process and the prerequisite for completing the cutting process is that the hardness of the tool material must be higher than that of the processed material Drill bit material category The materials of drill bits are generally divided into HSS HSS containing cobalt powder HSS and tungsten steel drill bits The hardness of the above drill bit materials increases step by step Under normal circumstances the hardness of the drill bit and the hardness of the workpiece can be converted into HV Wechsler hardness depending on whether the drill bit can drill or not or whether the workpiece can be worn If the hardness is more than three times that of the workpiece it is OK Of course the surface hardness of the drill is greater than that of the workpiece The higher the surface hardness the longer the life of the drill Selection of drill bit material The woodworking drill bit is used for drilling on the wood material the woodworking drill bit has large cutting volume the requirement on the hardness of the dth rock bit cutting tool is not high and the cutting tool material is generally high speed steel (HSS) Drill holes in general metal materials (alloy steel non-alloy steel cast iron cast steel non-ferrous metals) with metalworking drill bits which are generally made of high-speed steel (high-grade tools containing elemental cobalt HSS-Co) Percussion drills are used to drill holes in concrete materials and stone materials with masonry drills and the material of the cutter head is generally cemented carbide The ceramic tile drill bit is used for drilling on ceramic tiles and glass with higher hardness The tool material is tungsten-carbon alloy Due to the high hardness and poor toughness of the tool attention should be paid to the use of low speed and no impact Drill is a tool used to drill through holes or blind holes in solid materials and to ream existing holes The commonly used drill bits are twist drill flat drill center drill deep hole drill and trepanning drill It is customary to classify reamers and counterbores as drill bits although they cannot make holes in solid material


The specifications of various drill bits are shown in the table below Drill size 180 degrees Specification Small diameter Large diameter Full length Small diameter Blade Long handle diameter M33465651365 M4458075188 M55595852295 M666110902511 M8901401002812 M101101751103012 M121402001153212 1/4685110902511 5/168551401002812 3/81011501103012 1/21352001153212 Drill size 90 degree Specification Small diameter Large diameter Full length Small diameter Blade Long handle diameter M33464653564 M44584754284 M5551048550104 M6661259053120 M89016510053120 Drill size 180 degrees Specification Small diameter Large diameter Full length Small diameter Blade Long handle diameter M33465651365 M4458075188 M55595852295 M666110902511 M8901401002812 M101101751103012 M121402001153212 1/4685110902511 5/168551401002812 3/81011501103012 1/21352001153212 Drill size 90 degree Specification Small diameter Large diameter Full length Small diameter Blade Long handle diameter M33464653564 M44584754284 M5551048550104 M6661259053120 M89016510053120 Bit outer diameter bit length bit outer diameter bit length φ20mm350mmφ102mm350mm/420mm φ22mm350mmφ108mm350mm/420mm φ24mm350mmφ110mm350mm/420mm φ26mm350mm/420mmφ114mm350mm/420mm φ28mm350mm/420mmφ120mm350mm/420mm φ30mm350mm/420mmφ127mm350mm/420mm φ32mm350mm/420mmφ132mm350mm/420mm φ38mm350mm/420mmφ150mm350mm/420mm φ40mm350mm/420mmφ159mm350mm/420mm φ44mm350mm/420mmφ166mm350mm/420mm φ50mm350mm/420mmφ180mm350mm/420mm φ57mm350mm/420mmφ200mm350mm/420mm φ63mm350mm/420mmφ220mm350mm/420mm φ76mm350mm/420mmφ250mm350mm/420mm φ83mm350mm/420mmφ275mm350mm/420mm φ89mm350mm/420mmφ300mm350mm/420mm Drill size 180 degrees Specification Small diameter Large diameter Full length Small diameter Blade Long handle diameter
M33465651365 M4458075188 M55595852295 M666110902511 M8901401002812 M101101751103012 M121402001153212 1/46 dhd drill bit 85110902511 5/168551401002812 3/81011501103012 1/21352001153212 Drill size 90 degree Specification Small diameter Large diameter Full length Small diameter Blade Long handle diameter M33464653564 M44584754284 M5551048550104 M6661259053120 M89016510053120 Specification table for center bit Blade diameter (d) Blade diameter tolerance Blade length (L2) Shank diameter (D) Overall length (L) 04005 -005 053031 05005 -005 063031 06005 -005 073536 07005 -005 083536 08005 -005 094036 09005 -005 104036 10005 -005 124036 1240100 12005 -005 145042 15005 -005 185042 1850100 1850150 1850200 20008 -008 245042 2460100 2460150 2460200 25008 -008 306047 3080100 3080150 3080200 30008 -008 367757 36100100 36100150 36100200 32008 -008 387757 40008 -008 4810069 48100100 48100150 48100200 50012 -012 6011069 60120100 60120150 60120200 60012 -012 8016090 80012 -012 100180100 100012 -012 120180100 120012 -012 150220110 High-speed steel hollow drill bit also known as core drill bit or hole opener drill bit classification high-speed steel drill bit hard alloy drill bit tungsten steel drill bit; cutting depth 35MM 50MM 100M; suitable for drilling machine imported magnetic seat drill magnetic drill domestic magnetic seat drill magnet drill magnet drill steel plate drill magnetic drill machine tool bench drill seat drill and so on
Diameter specification 12mm to 100mm; the main materials of drill bits are high-speed steel powder


metallurgy and hard alloy The axis of the drill bit shall be inclined at an angle of 60 ° to the grinding wheel surface This angle is the point angle of the drill If the angle is not correct it will directly affect the size of the point angle of the drill the shape of the main cutting edge and the bevel of the chisel edge This refers to the position relationship between the axial line of the drill bit and the surface of the grinding wheel It is OK to take 60 ° which is generally more accurate Attention shall be paid to the relative horizontal position and angle position of the drill before sharpening The two positions shall be considered as a whole Do not neglect to set the angle for the sake of setting the cutting edge or neglect to set the cutting edge for the sake of setting the angle The greater the ratio of the length to the diameter of the drill bit the greater its tendency to bend The bending force can be reduced by reducing the length-diameter ratio thereby avoiding the breakage of the drill bit and the increase of the hole diameter error Deeper holes require drill sizes with larger length to diameter ratios Usually a hole with a depth of more than three times the diameter is a "deep hole" and the depth of a micro-drill generally exceeds this limit Specification of electric hammer bit 6mm 8mm X 110mm; 8mm X 160mm; 8mm 10mm 12mm X 210mm 10mm 12mm 16mm 20mm X 450mm The main body of the hard alloy electric hammer drill is made of high-quality alloy steel and the tool bit is welded with hard alloy Used together with various electric hammers suitable for drilling on hard building materials such as concrete brick etc It is a widely used and highly efficient punching tool in the construction and installation industry Specification of electric hammer bit set 5110mm × 6 Specification of electric hammer bit set 5110mm 6110mm 6160mm 8160mm 10160 mm Round shank and square shank of electric hammer bit 6MM 8MM 10MM 12MM 14MM 16MM-28MM is Through-wall drill length 350 MM 6MM 18MM 20MM 22MM 25MM 28MM Back to Sohu see more Responsible Editor wt-dthtools.com