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Long Lifespan Dry or Wet Drilling Vacuum Brazed Diamond Core Drill Bits for porcelain,ceramic,granite etc.


19 pieces 1-8mm MEIGAO111 Titanium plating HSS twist drill bits Solid Carbide Twist Drill Bit For CNC Drilling Work

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35mm Granite diamond core drill bits





35mm Granite diamond core drill bits

Premium quality diamond core bit designed for delivering the highest stone drilling and coring performance at the lowest cost.Diamond core bits work great on granite drilling, marble drilling and other hard stone drilling.

 Premium Dry Diamond Core Bits with T-Segment are manufactured with laser weld technology. So it guarantees long life time and strong connection with the steel body. EffimanTM diamond core bits are capable of drilling holes number from 100 up to 150 tested. They can be used either dry or wet. Please use water if you operate at higher speeds.


TecoTM Premium Dry Diamond Core Bit has it all: T-segments with diamond side protection. With T-segments, the segments are tightly bonded to the bit body and you don’t need to worry about breaking the segments. Side protection allows you to drill a cleaner hole faster.

Sizes available: 1″, 1-1/4″, 1-3/8″, 1-1/2″ and 2″. 

  • Designed for      drilling granite

  • Dry or wet use

  • 30 seconds per      hole on 3 cm granite

  • 100+ holes on 3      cm granite

  • Optimal speed 6000-7000 RPM.

  • 1″ diamond      core bits owns T-segments but no side protection.

Item No.





1”   Premium Dry Diamond Core Bit




1-1/4”   Premium Dry Diamond Core Bit


5/8”-11, M14


1-3/8”   Premium Dry Diamond Core Bit


5/8”-11, M14


1-1/2”   Premium Dry Diamond Core Bit


5/8”-11, M14


2”   Premium Dry Diamond Core Bit


5/8”-11, M14


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35mm Granite diamond core drill bits

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Packaging & Shipping



Our Services

1. Low MOQ:It can meet your trial order need well.

2. OEM Accepted:We can produce according to your sample or drawings.

3. Good Service: We treat our clients as God with high professionalism and passion.

4. Good Quality: We have strict quality control system .Good reputation in the market.

5. Fast & Cheap Delivery:We have big discount from forwarder (Long Contract & Big volume).

Company Information

Company Information:

RAIZI Toll Co.,Ltd established in 2006,engaged in manufacturing the most professional polishing and grinding diamond tools for concrete and terrazzo flooring industry in China.Our factory is located in Dongying,Shandong,China.We set up a strict quality control system and testing laboratory site to study and test the tools before they come to the market.RAIZI brings its know-how and proprietary technology to the concrete floor gringding industry.

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