Wet Welded Diamond Core Drill Bits for Drilling Hard Granite Marble,Outer Thread Gas1/2,Inner Thread M14,Diameter 20/25/30/35mm availble

SKU: A6700420

Size: 20mm
Thread: M14( European)

Item: 1pc Welded Diamond Drilling Core Bits (Wet)

Quantity: 1pc (we have 4 kinds of size for you choose, please choose the right one)

Specification: Diameter: 20mm, 25mm, 30mm, 35mm 

Total Length: 105mm; Diamond Height: 10mm; Outer Thread: Gas1/2 (Suitable for CNC machine), Inner Thread: M14 (Suitable for angle grinder).

Application: Drilling hard granite marble all nature stone, ceramic/tile, concrete. Suitable for CNC machine and angle grinder. 


  • Supreme Grade and Special bond matrix extends drilling life and improve the working efficiency

  • Ideal for drilling the faucet mounting holes in stone countertops, plumbing lines in showers and vanities

  • Wet drilling

  • Two kinds of thread, one drill bit can suitable for two kinds of machine.                   

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Note: These products are marked with our brand. If you do not want our brand name, please leave us message, we could send you products without brand. 

Customize service: If you order 20pcs we could mark your brand name on our products


Standard Free Shipping:

US&CA 10-15 Days | MX 15-30 Days | AU&NZ 8-15 Days | Europe 5-15 Days

Expedited Shipping:

If you need DHL Express,
Contact us now: Whatsapp: 189 5255 1577 Email: support@shadiatool.com or online chat.


Q:What material can this drill bit work on?

A: SHDIATOOL drill bits usually are able to work for various materials, please check our product description and product image to see details.

Q:What difference between red and gold and blue?

A: SHDIATOOL drill bits have different colors drill bits, but they are same quality.

Q: How can I know if this drill bit is suitable with my machine?

A: Please check your machine manual on the thickness and size of/where the arbor is, make sure these details is fine with this drill bit. Don’t worry if you have problem with the thread, SHDIATOOL has adapter solution for you too.

Q: How long can drill bit last?

A: Proper using and maintenance helps your SHDIATOOL drill bits work longer, make sure it under MAX RPM and nice temperature while working.

Still have questions? Contact us now: 189 5255 1577 support@shadiatool.com or online chat.

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