1. Wet or Dry Diamond Core Drill Bits for Granite or Hard Stone

2. This diamond core drill bits are designed for drilling the faucet-mounting holes in counter tops and vanities. It can also be used to make clean rounded corners for square or rectangular sinkholes.very versatile and can be adapted for use in construction trades wherever holes are needed for water,gas and electrical piping, especially when natural stone or ceramic tile is already installed.

3. Specification:

Diameter Ф	Segment
	No	Size
15	1
20	1
25	1
28	1
32	1
37	1
42	4	20x3.5x7
48	4	24x3.5x7
52	4	24x4.0x7
55	5	24x4.0x7
60	5	24x4.0x7
65	6	24x4.0x7
70	6	24x4.0x7
78	6	24x4.0x7
83	7	24x4.0x7
87	7	24x4.0x7
92	8	24x4.0x7
102	9	24x4.0x7
107	9	24x4.0x7
110	9	24x4.0x7
120	10	24x4.0x7
127	10	24x4.0x7
132	10	24x4.0x7
140	11	24x4.0x7
152	12	24x4.0x7

4. The connection can be M14, 5/8"-11 or 1/2BSP

Feature

1. Fast drilling

2. Clean drilling

3. chip-free ,Stable function and performance

How to Use

Attach the Dry Core Bit onto your high-speed angle grinder or hand held core drill.

Mark the location of holes that need to be drilled.

Use a template as a guide on the stone in order to avoid any mistakes during drilling process.

Clamp a piece of stone scrap under the stone being core drilled to prevent excessive chipping or “blowout” on the back side of the stone.

Proceed with drilling, pressing steadily until the dry core bit drills through the stone.
When drilling multiple holes, cool off the dry core bit by dipping it in cool water after each drilled hole.

Frequently Asked Questions (FAQs)

Q:What materials can be core drilled using the Dry Core Bits?
A: The Dry Core Bits are designed to be used on granite, engineered stone and porcelain slab materials.

Q: Can I use the Dry Core Bits on marble?
A: No. Marble is too soft and the heat created from dry core drill may crack the material.

Q: Can I use the Dry Core Bit wet?

A: Yes. Although these core bits are designed for dry use, wet cutting is recommended whenever possible. When core drilling within residential homes, the dry application is highly recommended; this will save time and money for time consuming clean-ups of the residence.Yes. Although these core bits are designed for dry use, wet cutting is recommended whenever possible. When core drilling within residential homes, the dry application is highlyrecommended; this will save time and money for time consuming clean-ups of the residence.

Q: What is the main advantage of using dry core bits over wet core bits?

A:We realized that many customers wanted to use wet core drills without water on the job site. When an installer has to makes an additional hole or two, they can not use water since the stone is already installed and using water will be difficult and costly due to the time consuming clean-up.

JDR Diamond Tools Co., Ltd is backed up by Jiangyin Jingrui Diamond Tools Factory. , a leading manufacturer of electro-plated diamond saw blades, diamond polishing pads, diamond core drill bits, diamond hole saws,diamond files,diamond pins, diamond grinding wheels,diamond cup wheel,diamond router bits,diamond profiling wheels and other diamond tools in China which is located in the famous city of Jiangyin.
To supply tools of the highest quality with the best possible service and to ensure that every tool offers unbeatable value, have been the simple objectives of our founders since 1999, and are the foundation stones of our business philosophy.
Quality is the guiding principle for our highly experienced development team. Only when their quality is proven and guaranteed are the tools released for sale. By listening carefully to customers' feedbacks, continual product enhancements improve not only quality but also performance and ease of use.
We provide not only tools, but also service. Our focus is on both production of foreign customers' requesting tools, and sourcing the right tools from China they need. Fast response to sample enquiries, rapid order processing and on time delivery ensures that customers' requirements are accurately and consistently satisfied, while this is guaranteed by years exporting experience in the field.
Our company has a well deserved reputation for offering outstanding value. Our China-wide sourcing capability, together with in-house design and development facilities further contribute to ensuring that all JDR's tools set the standard for value. By the good quality and competitive price, as well as the best service, JDR's tools have reached all over the world.