Rooftop Core Bits

Dry / Rooftop segment / For granite and quartz / High-tech silver brazed

Professional Dry Rooftop Core Drill Bit for Granite and Quartz

Dry drilling of granite and quartz requires a core bit capable of starting quickly while maintaining reliable drilling performance in hard stone materials.

DIATOP Rooftop Core Bit is designed as a high-performance dry core drill bit for granite and quartz.

The DIATOP original rooftop segment design provides faster penetration during the initial stage of drilling, while top-quality diamonds support drilling of hard granite.

A unique DIATOP sintering process is used to produce the bond matrix, and high-tech silver brazing helps prevent segment loss during operation.

Type of Equipment: D / D / HG (Drill Press / Power Drill / Handheld Grinder)

Key Features

• One of the finest core drill bits for granite and quartz.

• DIATOP original segment design.

• Faster penetration during the start of drilling.

• Top-quality diamonds for easy drilling of hard granite.

• DIATOP unique sintering process for the bond matrix.

• High-tech silver brazing to help prevent segment loss.

• Dry drilling.

• Rooftop segment design.

Available Sizes

Item – Diameter inch / Diameter mm / Thickness mm

• RDK 25 – 1 inch / 25 mm / 3.0 mm

• RDK 28 – 1 1/8 inch / 28 mm / 3.0 mm

• RDK 32 – 1 1/4 inch / 32 mm / 3.0 mm

• RDK 35 – 1 3/8 inch / 35 mm / 3.0 mm

• RDK 38 – 1 1/2 inch / 38 mm / 3.0 mm

• RDK 40 – 1 5/8 inch / 40 mm / 3.0 mm

• RDK 45 – 1 3/4 inch / 45 mm / 3.0 mm

• RDK 50 – 2 inch / 50 mm / 3.3 mm

• RDK 60 – 2 3/8 inch / 60 mm / 3.3 mm

• RDK 64 – 2 1/2 inch / 64 mm / 3.3 mm

• RDK 75 – 3 inch / 75 mm / 3.3 mm

• RDK 100 – 4 inch / 100 mm / 3.3 mm

• RDK 125 – 5 inch / 125 mm / 3.3 mm

* Thread: 5/8"-11, M14

* Other diameters available upon request.

Technical Notes

• Drilling Type: Dry

• Segment Type: Rooftop

• DIATOP original segment design

• DIATOP unique sintering process for bond matrix

• High-tech silver brazing

• Thread options: 5/8"-11, M14

• Other diameters available upon request

• Suitable materials: Granite, quartz

Typical Applications

dry granite drilling, dry quartz drilling, hard granite drilling, granite countertop drilling, quartz countertop drilling, countertop hole drilling, vanity drilling, rooftop core drilling, stone fabrication

Q1. What dry core drill bit is recommended for granite and quartz?

A. DIATOP Rooftop Core Bit is designed for dry drilling of granite and quartz and uses an original rooftop segment design for faster penetration during the start of drilling.

Q2. What features help the Rooftop Core Bit drill hard granite?

A. The catalog specifies top-quality diamonds for drilling hard granite, a DIATOP original segment design, a unique sintering process for the bond matrix, and high-tech silver brazing.

Q3. What sizes and thread options are available for the Rooftop Core Bit?

A. Standard diameters range from 1 inch (25 mm) to 5 inches (125 mm), with 5/8"-11 and M14 thread options. Other diameters are available upon request.

For Rooftop core drill bit selection guidelines, thread compatibility, dry drilling conditions, and troubleshooting guidance, please visit the DIATOP Tech Notes section.