Zhejiang, China
Business Type:
Manufacturer/Factory, Trading Company, Group Corporation
Business Range:
Electrical & Electronics, Industrial Equipment & Components, Instruments & Meters, ...
Management System Certification:
ISO 9001, ISO 14001
Main Markets:
North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, ...
Average Lead Time:
Peak season lead time: within 15 workdays
Off season lead time: within 15 workdays
OEM/ODM Service
Sample Available

Button Bit, Drill Bit, Drilling Bit manufacturer / supplier in China, offering 38mm Best Quality 7 tooth Insert Drill bit for Hard Granite, 12.5m3 8bar Steel Pressure Receiver Air Tank for Compressor, KSAD-60HF 67N.m3/min Hot Air Freezing Dryer and so on.

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Audited Supplier

38mm Best Quality 7 tooth Insert Drill bit for Hard Granite

Get Latest Price
Min. Order / Reference FOB Price
100 Pieces US $6.9-7.86/ Piece
Port: Ningbo, China
Production Capacity: 5000PCS/Month
Payment Terms: L/C, T/T, Western Union
Customized: Customized
Certification: AISI, API
Length: Taper-length
Type: Core Drill Bit
Material: High Carbon Steel
Usage: Masonry Drilling

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Basic Info

Model NO.
Tooth No.
7 Buttons
Head Dia.
7, 11, 12 Degree Could Be Customized
Golden, Red, Black Could Be Customzide
50PCS in a Wooden Box
Tooth Size
Button material
YK05 Carbon steel
Transport Package
Plywood Case
38mm, 8 tooth
HS Code
38mm 7 tooth Hight end 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 bit
IThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best quality
IIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz,  the hardest sandstone &limenstone rock f=15The best or                 high end quality
IIIvery hardcompact granite, very hard sandstone&limestone, quartz vein, hard conglomerate, very hard iron oref=10High end or Normal
IIIavery hardhard sandstone, limestone, marble,  dolomite,  pyrite ore, not hard granitef=8Normal 
IVhardnormal sandstone, iron oref=6Normal 
IVahardSandy shale, shaly sandstonef=5Normal 
Vmiddel hardhard pelitopsammite, not hard sandstone and limestone, soft  conglomeratef=4Normal 

Below is the typical rock photos from the hardest to normal hard for your reference. Just tell us your quarry/rock condition, we will recommend suitable button bit for you, it's easy.
38mm Best Quality 7 tooth Insert Drill bit for Hard Granite

38mm Best Quality 7 tooth Insert Drill bit for Hard Granite

We can  design various Carbide Alloy Drill Bit according to your requirements. Below is three differen quality button bit.
38mm Best Quality 7 tooth Insert Drill bit for Hard Granite


Tapered Button bit connection: 

 Drill bit diameter    Taper(°)   
281  3/326,7
301  3/166,7
321 1/46,7,11,12
341 11/326,7,11,12
351  3/86,7,11,12
361 13/326,7,11,12
381  1/26,7,11,12
401  9/166,7,11,12
411 5/86,7,11,12
421 21/326,7,11,12
431 11/166,7,11,12
451 3/46,7,11,12
501 31/326,7,11,12
602 3/86,7,11,12
Thread button bit connection:
Drill bit diameterThread standard
351  3/8R22 R25 
361 13/32R22 R25 R28
381  1/2R22 R25 R28 R32
431 11/16 R25 R28 R32
451 3/4 R25 R28 R32
481  7/8R32
642  1/2R38 T38
763R38 T38 T45
893  1/2R38 T38 T45 T51
1024T45 T51 ST58 SD60
1154  1/2T51 ST58 SD60
1275T51 ST58 SD60
1405  1/2T51 ST58 SD60
1526T51 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 more than 20 years' experiences, so you must be satisfied with our super quality.
38mm Best Quality 7 tooth Insert Drill bit for Hard Granite
Our superior products (taper button bit, taper drill rod, thread button bit and thread drill rod)
38mm Best Quality 7 tooth Insert Drill bit for Hard Granite

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, China

Q3: 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.
38mm Best Quality 7 tooth Insert Drill bit for Hard Granite

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