38mm 8 Tooth Tapered Hard Alloy Drill Bit for Mining

38mm 7 tooth button bit

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 special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The best orhigh 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=4Normal

Below is the typical rock photos from the hardest to normal hardfor your reference. Just tell us your quarry/rock condition, we will recommend suitable button bit for you, it's easy.

Wecan design variousCarbide Alloy DrillBit according to your requirements. Below is three differen quality button bit.

Tapered Button bit connection:

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 3/86,7,11,12
Thread 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 SD60

we 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.
Our superior products (taper button bit, taper drill rod, thread button bit and thread drill rod)

FAQ 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.