Multi-blade steel drill (also known as hollow drill or core drill)It is a high efficiency drill with multi - blade ring cutting12 mmto150 mm, mainly used for drilling of steel members, such as steel structure engineering, rail transportation, Bridges, ships, machinery manufacturing, aerospace, and other areas of the hole drilling, the drilling performance is superior to the traditional two blade twist drill, drilling drilling with high efficiency, light energy, the characteristics of blade steel drill and magnetic block drilling rig can form a complete set of large workpiece multi-faceted, convenient and flexible operation, effectively shorten construction time, become a modern steel members and circular groove processing drilling tool of choice.

   There are two main types of multi-edge steel plate drilling materials: high-speed steel plate drilling, and hard alloy steel plate drilling. High speed steel plate drilling has good stability and regrinding property, it is the main application series at present. The hard alloy steel plate drill has high cutting speed and can finish drilling well for complex materials.

emptyheartBit (T.C.T.A nnular cutter) and core bit, core drill, tubular drill bits, core drill bit, metal core, core, reaming drill, reamer bit, magnetic drill bit, magnetic drill bit, magnetic drill bit, etc., the working principle of hollow drill: by two or more groups of the cutting tools3 blade combination,The 3 combined edges are composed of several outer, middle and inner edges. In the cutting process of each blade, only about 1/3 of the work is carried out. In addition, there are cutting knives on the inside of each blade. Therefore, the chip removal can be very smooth. In addition, due to the characteristic that each blade bears part of the cutting work respectively, it is very difficult for the hole drill to produce the phenomenon of cutting edge collapse(T.C.T.A nnular cutter) drill classification: 6-130mm high speed steel drill, 12-160mm hard alloy drill T.C.T, 12-160mm tungsten steel drill; Effective cutting depth: 25mm, 35mm, 50mm, 75mm, 100mm, 120mm, 150mm, 180mm, 300mm; Drilling diameter specification: 12 mm to 160 mm; The hollow drill is mainly made of high speed steel. Powder metallurgy; Hard alloys. According to the handle type, it can be divided into:W.eldon s.HankRight Angle shank hollow drill, flat shank hollow drill,The quick The inUniversal shank hollow drill,letterHollow drill with four-hole handle, p-type right-angle drill with right shank, hollow drill with screw handle, etc.Suitable for motors:Magnetic drill /Magnetic bench drill/drill/lathe/milling machine, with complete types and specifications, it is suitable for imported magnetic base drilling magnetic drill of various brands, such as:Suitable for drilling RIGS: universal shankThe quick The in(three points in a plane)ALFRA alfa,BDS, bede betis, etc., overtone handleletter(hollow drill with four-hole handle)FEIN German overtones, the Japanese east handle suitable for the Japanese east drillWait for import brand, straightAnglehandleW.eldon s.Hank (taper shank, two planar handles) is suitable for all kinds of domestic magnetic drill, and general drilling machine, vertical bench drill, milling machine, boring machine, machine tool, etc. Each drill can drill 1000-3000 holes. This product is used in conjunction with magnetic base drill. The drilling efficiency is ordinary drill 8 ~ 10 times.