Deep aperture treatment is to show long way is compared (namely of hole depth L and bore diameter D than) be more than 5 ～ the aperture treatment of 10. Common deep aperture (L/d<5 ～ 20) can use lengthen or receive long twist drill to undertake machining, to especially deep aperture (L/d>20 ～ 100) must be versed in undertake machining with deep aperture cutting tool on the machine tool in special device, special deep Kong Jia. When deep aperture is machined, kong Wei closes partly, its are inherent difficult problem is: It is difficult to break bits, platoon bits, thermal conductivity is poor, refrigeration is lubricant and not easy, still shake difference of tigidity of meeting occurrence cutting tool, easily, shake, be out of shape, break off wait for a circumstance. German Botek company develops ability and the rich experience that accumulate for a long time with its powerful scientific research, already developed a wholer cutting tool system that suits all sorts of treatment methods to use. Deep Kong Zuan of double blade of sheet of bits of the platoon outside including, gush is sucked auger, set makings getting, establish milling cutter kind, inside series of the BTA that discharge bits kind, the gun that takes diamond bit is gotten and all sorts of special shape by need custom-built deep Kong Dao to provide. Of Botek company outside deep aperture gets the Chan Shuangren that discharge bits (the gun is gotten) share 13 kinds of model, among them 7 kinds of model are used at reaming. This kind of deep Kong Zuan gets a handle to comprise by cutting part and drill pipe, applied range is the widest, its principle is high-pressured oil by drill pipe hind in aperture infuse, cut bits to follow cutting fluid via after lumbar form aperture reachs cutting area, be being forced by eduction of the space between V chamfer and workpiece hole wall, friend says outside platoon bits. Face of the knife before this kind of deep Kong Zuan is 0 ° commonly, make in order to facilitate. It does not have horizontal blade, get pointed deviate axes, the square before the tip is being gotten when bore becomes roundlet awl, can make cut bits to be broken in the place that get a tip from it is two paragraphs, make easily eduction. The appearance of cutting part is right the public errand of aperture, cut bits to form, deviate of line of life of force of cutting hydraulic pressure, discharge, cutting tool, center and treatment quality all influential. Botek already developed the appearance of cutting part geometry that gives a variety of differring in the light of different treatment material. The cutting part that gun of Botek odd knife gets deep aperture of bits of the platoon outside Chan Ren (nose ministry) outside be being formed as a result of axes of the deviate that get a tip inside 2 blade. Outside blade (advocate cutting blade) shorter, inside blade (deputy cutting blade) longer. The tool cutting edge angle that blade forms outside is more than inside what blade forms is deputy slant horn, cause effect the radial load on outer blade is more than action at inside the radial load on blade, make from beginning to end action of do one's best is in guide on, make guide a play its support oriented action, prevent broach getting to slant. Bore diameter expands, can produce roller to control function to hole wall, improve circularity and integral treatment quality, IT7 class hole can be drilled below specific cutting condition. Guide configuration is very important. Larger to the diameter deep hole is gotten, guide can set mount. Botek already was designed make give a variety of guiding a form that prop up choose for the user. The treatment circumstance that deep Kong Zuan of bits of the platoon outside Botek Chan Ren applies to machining center and the lathe that provide high-pressured refrigeration system and vertical machine tool, cutting tool or workpiece to rotate, the smallest diameter is broach only 0. 7mm. Minimum can be used below specific requirement lubricant means (MQL) undertakes machining. Deep Kong Zuan of bits of the platoon outside Chan Ren is not had from centering function, get because of when this treatment is machined, needing to use cover or guide aperture. Deep aperture of bits of the platoon outside Chan Ren gets support to guide a bearing balance is oriented, the Shuang Ren first flank that relies on semmetry. Deep Kong Zuan of Botek double blade is type of hard alloy of double blade whole. Shuang Ren cutting part is a flight of stairs of hard alloy type to get for hard alloy type, Shuang Ren cutting part (handle of drill pipe getting is steeliness) . Gun of Botek double knife is gotten inside discharge bits deep Kong Zuan inside the bit that platoon bits deep aperture gets (cutting part) comprise with threaded coupling commonly with drill pipe, oil of cutting of the high pressure when the job is mixed by the circle outside drill pipe the interstitial infuse between workpiece hole wall, fluid of cutting of the be accompanying that cut bits by eduction of drill pipe center. Deep aperture of platoon bits system gets Botek to call BTA system inside, each factory also uses this. System of bits of the platoon inside Botek still includes to pull boring type cutting tool. The gush of Botek is sucked getting is to use eduction of effect of cutting liquid eject to cut bits, general center has inside, outside two canals, the cutting fluid that makes an appointment with 2/3 is in charge of the Kong Liu of the space between and broach forehead to enter cutting area by inside and outside, undertake cool and lubricating to cutting ministry, oriented ministry, next nip belt cuts bits from the eduction in inner tube; The cutting fluid that makes an appointment with 1/3 additionally from all around crescent moon form after inner tube narrow seam nozzle backward eject, as a result of nozzle aperture narrow, velocity of flow is rapid, produce eject effect, in all round form meiobar, form in inner tube around press difference, before generation is right paragraph attraction, make cutting fluid flows to stability, platoon bit is good, can rise auger cut efficiency. Divide double-barreled of inside and outside beyond, additionally sheet is in charge of type to be formed by special nozzle and shunt device. Botek but a makings getting bore of Botek of dislocation BTA system but material intermediate makings core is cut take, stay can use once more, can decrease cut bits, improve productivity. CNC Milling