Diamond Core Bits for Stone, Granite & Concrete | UK Trade Supplier
Our diamond core bits are precision engineered for clean, accurate hole cutting in granite, marble, quartz, concrete, brick, and porcelain. Used by kitchen installers, plumbers, stone fabricators, and construction professionals, our core bits are available in a wide range of diameters to suit everything from tap holes in worktops to larger penetrations in wall and floor materials. Wet core bits are recommended for stone and granite to extend tool life and reduce heat build-up, while dry core bits suit brick and block applications. All our core bits are available in standard M14 and 5/8" BSP fittings, compatible with most angle grinders and core drilling rigs. We stock both standard and thin-wall core bits for applications where minimising material loss is important. Browse the full core bit range below, or get in touch if you need advice on diameter, depth, or fitting compatibility.
Core Bits 6-150mm, Vacuum Brazed, M14, 40mm working length are professional vacuum brazed diamond core drills designed for drilling clean holes in stone, granite, marble, limestone and other hard materials. The vacuum brazed diamond bond provides excellent cutting speed and long tool life even in the most demanding materials.
With a 40mm working length and M14 fitting, these core bits are compatible with all standard M14 angle grinders and are also suitable for use with a drill and water feed for wet drilling. Available in a wide range of diameters from 6mm to 150mm to suit a variety of hole sizes.
Key Features:
• Vacuum brazed diamond for fast cutting and long life
• 40mm working length
• M14 fitting — fits all standard angle grinders
• Available in sizes from 6mm to 150mm diameter
• Suitable for granite, marble, limestone, sandstone and hard stone
• Can be used wet or dry
Best for: drilling cable and pipe holes, creating sink cut-outs, drainage holes and feature openings in stone worktops and flooring.
Granite and Quartz cores drills with 70mm working length and M14 fitting. These have a tooth thickness of 2mm and a height of 10mm.
Wet use granite core bits, 200mm working length with 1/2” gas/BSP thread
Best Selling Core Adaptors
Wet core chuck and cores for porcelain and ceramics.
The sintered diamond core bits are best used wet for the cleanest cuts and to increase the lifespan of the cores.