JOHNSON TOOLS 70mm Diamond Core Drill Bit with 8mm Segment Height for Granite and Stone Drilling

Name: JOHNSON TOOLS 70mm Diamond Core Drill Bit with 8mm Segment Height for Granite and Stone Drilling
Brand: Johnson Tools Manufactory Co.,Ltd

Professional 70mm diamond core drill bit with 12.7mm shank and 50mm drilling depth. Features normal segment type design for granite, marble, and natural stone applications. Enhanced durability for industrial use with 8mm diamond segments. Accepts OEM orders and custom branding with flexible shipping options.

Machine: Core Drilling Machines or Hand Machines

Place of Origin CHINA

Segment Type Normal Segment Type

Size 70mm

Packaging Details Plastic box, Paper box

Materials Metal Bond

used core i3 desktop type n female connector 2 core wire 1mm

Product Description

Product Overview

Premium 70mm diamond core drill bits designed specifically for professional stone drilling applications. These normal segment type bits deliver exceptional performance on granite, marble, sandstone, limestone, and other natural stone materials.

Technical Specifications

Diameter: 70mm (2 3/4")

Shank Size: 12.7mm (1/2")

Total Length: 83mm (3 1/4")

Drilling Depth: 50mm (2")

Segment Height: 8mm

Detailed Specifications

Item No.	Diameter (mm)	Segment Height (mm)	Segment Thickness (mm)	Teeth No.	Total Length (mm)
BGB70	70	8	3	7	83

How Diamond Core Bits Work

Diamond core bits operate through a milling process rather than traditional cutting. During manufacturing, individual diamond crystals are exposed on the segment surfaces, performing the milling work while being securely held by the metal matrix. The optimal balance between diamond performance and bond abrasion-resistance ensures maximum efficiency across different material types.

For hard, dense materials: Softer segment bonds wear faster, continuously exposing fresh diamond crystals for consistent cutting performance.

For soft, abrasive materials: Harder, abrasion-resistant segments retain diamonds longer, providing extended tool life.

JOHNSON TOOLS 70mm Diamond Core Drill Bit with normal segment type for granite and stone drilling applications

Frequently Asked Questions

Can you company accept OEM?

We accept OEM orders for all products, including custom buyer logos and branding requirements.

Quality Control?

Each product undergoes strict quality control checks. With 15 years of manufacturing experience, we maintain consistent quality standards and provide products tailored to specific market requirements.

Shipping Methods?

Air Freight: 45-100kg gross weight for fast delivery. Sea Freight: Above 100kg for cost-effective shipping. Courier Services: TNT, DHL, FedEx, UPS for small orders with door-to-door service.

Minimum Order and Delivery?

Minimum order quantity is negotiable. Standard delivery timeframe ranges from 15 to 45 days depending on order volume.