Core Bit for Drilling Stones, Diamond Core Bit

Product Description

Diamond drilling is a key tool in stone processing. With its super-hard characteristics, it is widely used in drilling operations of various types of stone. The following is a detailed analysis of its characteristics and applications from multiple dimensions:

1. Core principle and structure
Material advantages
Diamond (natural/artificial) is the hardest known substance (Mohs hardness 10), which can easily cut high-hardness stones such as granite and marble, avoiding the rapid wear of ordinary drill bits.

Structural design

Cutter head: It is sintered with diamond particles and metal powder (such as cobalt and nickel). The "impregnation" process ensures that the particles continue to fall off and expose the new cutting surface.

Matrix: Usually high-strength alloy steel, some high-end products use lightweight design (such as aluminum alloy matrix) to reduce hand-held operation fatigue.

2. Applicable scene segmentation
Stone type

Granite: A high-concentration diamond bit (such as 40-50 concentration) is required to cope with the characteristics of high quartz content.

Marble: Medium concentration (30-40) is sufficient, and attention should be paid to cooling to prevent calcium stone from burning and discoloration.

Artificial quartz stone: Wet and dry drill bits are recommended to avoid uneven hole walls caused by the resin component swelling in water.

Industry application

Architectural decoration: curtain wall keel installation holes, railing fixing holes.

Home decoration: countertop water pipe holes, embedded appliance installation holes (such as gas stoves).

Art carving: hollow carving starting holes, special-shaped cutting guide holes.

3. Technical parameters and selection guide
Specification selection

Aperture matching: Common diameters are 6-120mm. For large diameters (>100mm), it is recommended to use a hollow drill to reduce torque.

Depth requirements: The standard drilling depth can reach 300mm. For deep hole operations, an extension rod or segmented drilling is required.

Comparison of process types

Type Electroplated diamond drill bit Sintered diamond drill bit Laser welded drill bit
Cost Low (suitable for short-term use) Medium High (industrial grade)
Lifespan 500-1000 holes 2000-5000 holes 10000+ holes
Applicable scenarios DIY, small batch Conventional engineering Continuous production line
IV. Operation optimization and problem handling
Advanced skills

Step drilling method: Pre-drill the pilot hole with a small drill bit first, then change to a large drill bit to expand the hole to reduce edge cracking.

Speed control: 800-1200 RPM is recommended for granite, and 1500-2000 RPM can be increased for marble.

Pressure adjustment: Lightly press in the initial stage, apply pressure evenly after entering the stable stage, and slow down to prevent drilling jams when exiting.

Troubleshooting of common problems

Drilling speed reduction: Check whether the cooling is sufficient and whether the cutter head is blunt (professional grinding is required).

Rough hole wall: may be caused by drill bit swing, check the clamping accuracy of the equipment or use a guide frame.

Abnormal noise: stop drilling immediately, check whether the drill bit is eccentric or there are metal impurities inside the stone.

V. Maintenance and life extension
Cleaning and maintenance

Rinse the residual stone powder with clean water after each use to prevent adhesion and clogging of the cutter head pores.

Soak in pH neutral detergent regularly to remove metal chip deposits.

Storage specifications

Hang vertically or lay flat on shockproof pads to avoid cutter head collision.

Apply anti-rust oil during long-term storage, especially for alloy base parts.

VI. Economic analysis
Cost comparison: Taking Φ20mm hole as an example, the unit price of ordinary carbide drill bit is 30 yuan (lifetime 50 holes), the unit price of diamond drill bit is 150 yuan (lifetime 2000 holes), and the cost per hole is reduced from 0.6 yuan to 0.075 yuan.

Efficiency improvement: granite drilling speed is increased by 3-5 times, reducing labor time.

Through scientific selection and standardized operation, diamond drill bits can significantly improve the efficiency and accuracy of stone processing, and are indispensable precision tools in the construction and decoration industries. In actual use, it is necessary to flexibly adjust parameters according to specific working conditions to maximize tool efficiency.
Wet Concrete Core Bit, core bits, Diamond turbo core bit used for drilling stone concrete and building materials, ther offer drilling performance. Very free drilling and easy to do drilling operation.

1. High cutting efficiency core bit
2. Durable for long life use diamond core bit
3. Different quality grade for clients choose
4. Other special specifications and colors can be produced by clients require.





 

Diameter	Width	Height	Arbor
1"	2.0mm	8.mm	5/8"-11
1-1/8"	2.0mm	8.mm	5/8"-11
1-1/4"	2.0mm	8.mm	5/8"-11
1-3/8"	3.0mm	8.mm	5/8"-11
1-1/2"	3.0mm	8.mm	5/8"-11
1-3/4"	3.0mm	8.mm	5/8"-11
2"	3.0mm	8.mm	1-1/4-7
2-1/4"	3.0mm	8.mm	1-1/4-7
2-1/2"	3.0mm	8.mm	1-1/4-7
3"	3.5mm	8.mm	1-1/4-7
3-1/2"	3.5mm	8.mm	1-1/4-7
4"	3.5mm	8.mm	1-1/4-7
4-1/2"	3.5mm	8.mm	1-1/4-7
5"	3.5mm	8.mm	1-1/4-7
6"	4.0mm	8.mm	1-1/4-7
7"	4.0mm	8.mm	1-1/4-7
8"	4.0mm	8.mm	1-1/4-7
9"	4.0mm	8.mm	1-1/4-7
10"	5.0mm	8.mm	1-1/4-7
12"	5.0mm	8.mm	1-1/4-7