Product Name: 15 buttons Concave Face Russian Type CIR 110mm DTH Drill Bit Model NO.: 110mm Russian DTH drill bit Usage: Wood Drilling, Well Drilling, PCB Drilling, metal Drilling, Masonry Drilling Material: Tungsten Carbide Type: Core Drill Bit Length: Stub-length Certification: AISI, API Customized: Customized Tooth No.: 15 Buttons Head Dia.: 110mm Colour: Golden, Black Could Be Customzide Package: 5PCS in a Wooden Box Weight: 5KG/PCS Carbon material: High Carbon alloy Application: Water weill drilling, quarry Processing: Forging Matched Hammer: BMK5 hammer Trademark: could be customized Transport Package: Plywood Case Specification: 110mm, Russian Type, 15 buttons Origin: China HS Code: 8207199000 Product Description 110MM Russian Type CIR DTH Drillbutton bitDTH drilling tool is widely used in underground mining, quarries, hydraulic and Hydro-Power Engineering, water well drilling, Mineral exploration, anchoring hole drilling, geothermal engineering, Subway excavation, another civil engineering. it has the advantage of high flatness, smooth hole wall, high rigid of drill rod and hammer, independent of high axial thrust, no limit of drilling depth, low cost of devices and easiness to maintain. At the drilling hole of dia.105mm-dia.254mm, a plenty of the DTH drilling tools are used.The selection of button bit is quite concerning with the rock condtion. If you don't know how to choose an applicable button bit, we strongely suggest you study the rock conditon first.Below is the rock hardness grade list for your reference.Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other extremely hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The best or high end qualityIIIvery hardcompact granite, very hard sandstone&limestone, quartz vein, hard conglomerate, very hard iron oref=10High end or NormalIIIavery hardhard sandstone, limestone, marble, dolomite, pyrite ore, not hard granitef=8NormalIVhardnormal sandstone, iron oref=6NormalIVahardSandy shale, shaly sandstonef=5NormalVmiddel hardhard pelitopsammite, not hard sandstone and limestone, soft conglomeratef=4NormalBelow is the typical rock photos for your reference. Just tell us your quarry/rock condition, we will recommend suitable button bit for you, it's easy.Drill bit diameter Taper(°) (mm)(in)281 3/326,7301 3/166,7321 1/46,7,11,12341 11/326,7,11,12351 3/86,7,11,12361 13/326,7,11,12381 1/26,7,11,12401 9/166,7,11,12411 5/86,7,11,12421 21/326,7,11,12431 11/166,7,11,12451 3/46,7,11,12501 31/326,7,11,12602 3/86,7,11,12Thread button bit connection:Drill bit diameterThread standard(mm)(in)351 3/8R22 R25361 13/32R22 R25 R28381 1/2R22 R25 R28 R32431 11/16R25 R28 R32451 3/4R25 R28 R32481 7/8R32512R32642 1/2R38 T38763R38 T38 T45893 1/2R38 T38 T45 T511024T45 T51 ST58 SD601154 1/2T51 ST58 SD601275T51 ST58 SD601405 1/2T51 ST58 SD601526T51 ST58 SD60we can guarantee all our product:(1) Direct factory wholesale price, price is cheaper than trading companies.(2) Strict Quality Control Department, each piece bit need to be checked.(3) Accept custom order. can special make for you.(4) Focus on the quality.We seek long-term interest.(5)Welcome small orders, our Min Quantity Order is 1 piece.(6) All bit are made by skilled workers and advanced technology, we have morethan 20 years' experiences, so you must be satisfied with our super quality.5pcs DTH drill bit packed in one wooden boxThe Similar Russian type Cross DTH drill bit.Our factory and workshopFAQ Collection:Q1: Are you factory or trade company?A1: We are factory. And we have ourselves trading company.Q2: What the exactly address of your factory?A2: Our factory is located in No.9 Kaixuan Ave West,Economic Zone Quzhou, Zhejiang, ChinaQ3: Warranty terms of your machine?A3: One year warranty for the machine and technical support according to your needs.Q4: Will you provide some spare parts of the machines?A4: Yes, of course.Q5: What about the voltage of products? Can they be customized?A5: Our standard voltage is 380V, 50HZ, 3phase. The voltage can be customized according to your equirement.Q6: Which payment term can you accept?A6: 30% T/T in advanced, 70% T/T against the B/L copy.Q7: How long will you take to arrange production?A7: we can delivery the normal goods within 7-15 days. Other nonstandard electrical items we will delivery within 25-30 days.Q8: Can you accept OEM orders?A8: Yes, with professional design team, OEM orders are highly welcome.Q9: Which trade term can you accept?A9: Available trade terms: FOB, CIF, CFR, EXW, CPT, etc.