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Quick Details

  • Place of Origin: Hunan, China (Mainland)
  • Brand Name: DIYFIA
  • Model Number: HQ
  • Type: Drill Bit
  • Machine Type: Drilling Tool
  • Certification: ASTM, ISO9001:2000
  • Material: Carbide
  • Processing Type: Forging
  • Use: Ore Mining
  • Name: AQ BQ NQ HQ PQ rock bit / diamond core drill bits for hard rock
  • Size for HQ: 95.76/63.63MM
  • Matrix height: 10mm-14mm
  • Suitable rock: middle, hard, ultra-hard all can do
  • Waterway: 6mm
  • Application: Geological Drilling
  • Advantage: Short time for collect core
  • Weight: 2.2kg
  • Web.: www.diyfia.com

Packaging & Delivery

Packaging Details 10pcs /cartom, 25kgs/Carton
Delivery Time Shipped in 6 days after payment

               AQ BQ NQ HQ PQ rock bit / diamond core drill bits for hard rock          







High credibility"---DIYFIA Company Purpose and Target!!

Product Description

 1. Introduction: diamond core bit, impregnated diamond core bit, surface-set diamond core bit, diamond casing bit, diamond casing shoe bit, TC bit, TC casing bit, TC casing shoe bit, synthetic diamond bit, reaming shell, diamond reaming shell, corelifter, corelifter case, casing recovery tap etc.


2. Use:

Drill soft to hard rock, widely used in all kinds of drillings for prospecting, water and electricity building and construction industry of road, railway, bridge and building taking out core to examine stake, etc.



They are manufactured with very small, high quality synthetic diamonds mixed evenly through a metal matrix. DIYFIA core bits are manufactured to give optimum penetration rates and bit life, which is required to keep the cost of diamond drilling to minimum.


4. Avaliable Size:


                                                           Dimensions of Core Bits

Q Series


T, TT, T2&TB Series

T36, TT46, T2-46, TB56, TT56, T2-56, T2-66, T2-76, T2-76 Core line, T2-86, T2-86 Core line, T2-101,T2-101Core line

T6 Series

T6-76, T6-86, T6-101, T6-116,   T6-131, T6-146

B Series (ISO3552-1)

B36, B46, B56, B66, B76, B86, B101, B116, B131, B146

WF Series:


WT Series:

RWT, EWT, AWT, BWT, NWT, HWT (Single Tube/Double Tube)

WG Series:

EWG, AWG, BWG, NWG, HWG (Single Tube/Double Tube)

WM Series:


N Guage Core Bits


H Gauge Core Bits

WLH, WLH-3.830, WLH-3.895, WLH3, WLHTT, HMLC, HWF-long, HWM,HWT


Detailed Images


Production Progress



Quality Guarantee

Our Company pas atention to produce quality and abides to credit, and also does the best to provide the quality produdcts and excellent service to customer. To build good after-sale service system, we draw up the Quality Guarantee according to the industrial standards combining field experience. 

Diamond Drill Bits 

1. Size, and / or technical parameters(matrix etc.) are different from the requirements of clients' purchase order.



2. Thread can not fit clients' barrel.


Repair    or replace

3. Break down a piece from matrix, and the volume of the piece exceed 2mm*2mm*2mm, and such break is not caused by drilling. 



4. Matrix falling not caused by drilling.


Replace or return

5. Groove on matrix caused by manufacturer.


Replace or return

 6. Drilling speed is obvious slower than congener products caused by manufacturer.


Raplace,and each item quantity does not exceed 3pieces. 

7. Bit life is obvious short caused by manufacturer.


8. Breaking down of matrix, falling matrix, groove and short bit life caused by operating reasons-drill rod sticking, premature failure of the bit crown and hole-bottom not to be cleaned. 


Be excluded from Qulity Guarantee  

9. Short bit life or no penetration caused by drilling machine, drilling techniques or parameters.


10. Properly worn and the matrix is finished.


11. Thread damaged or distorted due to improper operation.


12. Steel body cracked in drill. 


 Replace or return
Reaming shell

1. Thread is not correct.


 Replace or return.  

2. Steel body creacked in drill.


3. PCD Strips falling. 



Packaging & Shipping



Company Information




Q1: Are you a manufacturer or trading company?

A: We are a specialized manufacturer, with 28years experience on export business.


Q2: What's your delivery time?
A: We usually ship between 4 days for bits and 8working days for core barrels. Surface type moslty have stock for immediate shipment. Drilling rig and mud pump machine are stock on hand.

Q3: Does your company belongs Trade Assurance?

A: Yes, our company is Trade Assurance on Alibaba,It means 
 you will get 100% payment refund up to Trade Assurance Amount if we can’t meet agreed delivery and quality terms contained in the contract


Q4: Do you accept sample order?

A: Yes sure, please contact us for details.


Q5: How about discount?

A: Price is based on products and order quantity.


Contact Information









Transaction History of the Supplier

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Transaction Overview


Transaction Details

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Trade Assurance
China (Mainland) | Trading Company
Transaction Level:
Supplier Assessments:
5 Transactions 10,000+
The supplier’s transactions conducted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $32,000
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