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 tools3Blade combination,3The composite edge consists of several outer edge, middle edge and inner edge. Each blade is only burden during cuttingA thirdThe left and right workload, plus the inside of each blade are also cutting knives. 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 drilling hole to break the edge,Hollow drill(T.C.T.A nnular cutter) drill classification:6-130 - mmHigh speed steel drill,12-160 - mmCarbide bitT.C.T,12-160 - mmTungsten steel drill; Effective cutting depth:25 mm、 35 mm,50 mm,75 mm,100 mm,120 mm,150 mm,180 mm,300 mm; Drilling diameter specification: 12 mmto160 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,letterFour bore hollow bit,pType right Angle shank hollow drill, screw handle hollow drill, 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)ALFRAalfa,BDSPadbitis, etc., overtonesletter(hollow drill with four-hole handle)letterGerman overtone, the east handle suitable for the east drillWait for import brand, straightAnglehandleW.eldon s.HankIt is suitable for all kinds of domestic magnetic drill, general drilling machine, vertical bench drill, milling machine, boring machine, machine tool, etc. Each bit can be drilled1000-3000Four holes, this product is used with magnetic base drill, drilling efficiency is common drill 8 ~ 10Times.