4Pcs 6-12 mm Professional Angle Grinder Dry-cut Diamond Drill Bits for Drilling and Grinding – 38 mm Drilling Depth, M10 Thread, Suitable for Tiles, Marble and Granite

Product Details
🔥 Key Selling Points (Why Choose This Drill Bit?)
1. Upgraded brazing process + high-quality diamonds
Advanced vacuum brazing technology is used to securely bond high-hardness diamonds to the substrate. Compared to traditional electroplated drill bits, these do not shed grit or chip, becoming sharper with use, ensuring truly long-lasting durability.

2. Dry Drilling Without Water, Built-in Cooling Wax
Designed for convenience on construction sites, the drill bit contains pre-embedded cooling wax that automatically melts and lubricates during high-speed rotation, effectively reducing the bit’s temperature. No external water source is required, eliminating the mess associated with wet drilling. It is particularly suitable for high-altitude or indoor work where water is unavailable.

3. Two-in-one: Drilling + Grinding
Not only is it a drilling powerhouse, but when inverted, it can be used as a grinding head. Whether trimming edges or smoothing out holes, it delivers a smooth, burr-free finish, with test results showing a flat and aesthetically pleasing ground surface.

4. 38mm Extended Drilling Depth
With a working length of 38mm, it effortlessly penetrates various thick tiles and double-layered panels, meeting drilling requirements for a wide range of thicknesses.

🧱 Suitable Materials (Widely Compatible Materials)
This drill bit is specifically designed for high-hardness, brittle materials and requires no water; it can be used for dry drilling:

✅ Porcelain Tiles

✅ Vitrified Tiles

✅ Ordinary Glass

✅ Ceramics

✅ Marble

✅ Granite

✅ Microcrystalline Stone

✅ Quartz Stone

🔧 Product Specifications
Diameter    Total Length    Working Depth    Thread    Weight
6mm    60mm    38mm    M10    20g
8mm    60mm    38mm    M10    22g
10mm    60mm    38mm    M10    27g
12mm    60mm    38mm    M10    28g
Note: Manual measurements may contain slight discrepancies; please refer to the actual product.

⚙️ Compatible Tools
Standard interface: M10 threaded shank

Suitable for the vast majority of 100/125 series angle grinders on the market (please ensure the grinder has an M10 internal thread).

🛠️ Professional Drilling Tips
To achieve optimal drilling results and extend the life of the drill bit, please follow this two-step method:

Groove Positioning:

Set the angle grinder to high speed.

Tilt the drill bit and lightly rest it against the wall to grind a crescent-shaped positioning groove, preventing slippage.

Drilling and Chip Removal:

Slowly align the drill bit vertically.

Apply downward pressure at a steady rate whilst gently wiggling the drill bit (this is crucial!). Wiggling helps to clear debris and prevent the drill bit from jamming; never apply forceful, vertical pressure continuously.

Cooling:

Once the built-in cooling wax has been used up, we recommend using water for cooling, which can further extend the drill bit’s service life.

📦 Package Contents
1 x Diamond Drill Bit (Drilling & Grinding) (Shipped according to selected specifications)

⚠️ Tips & Warnings
Safety first: Please wear safety goggles and a dust mask during operation.

Speed control: We recommend using an angle grinder with variable speed control, maintaining a high speed with light pressure.

Debris removal is crucial: Maintain a slight wiggling motion throughout to ensure smooth removal of powder; this is key to achieving a smooth hole finish.