Diamond Diamond Core Drill Bit – Core bits with SDS

Johnson Tools Laser Welded Diamond Core Bits | 68mm/82mm Brick Hole Saw for Electrical Wall Boxes

Engineered specifically for professional electricians and HVAC contractors, this “Dry Core” diamond hole saw is the definitive tooling solution for flush-mounted switch and socket box installations. Precision-sized at standard 68mm and 82mm diameters, it ensures exact cavity dimensions for electrical housings. Featuring premium Laser Welded segments, this hole saw reliably withstands the extreme thermal stress of dry drilling through Concrete, Hard Brick, Masonry Blocks, and Natural Stone. It delivers high-speed penetration with zero risk of segment loss, maximizing both operational efficiency and onsite operator safety.

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Out Diameter:	68mm, 72mm, 82mm
Working Length:	70mm
Connection:	5/8-11 Thread or M16 Thread
Application:	Concrete and Reinforced Concrete

5-Turbo Diamond Segments | Ultra-Fast Cutting and Superior Chip Removal
As shown in the illustration, this hole opener utilizes a specially designed 5-turbo diamond segment. The segment height reaches 10mm, and the thickness is 4.0mm. This turbine tooth design creates highly efficient chip removal channels on both the outer and inner sides, significantly reducing dust accumulation in the kerf during dry cutting. This reduces frictional resistance, resulting in extremely smooth cuts, flat hole wall surfaces, and faster feed rates.

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Why Choose This Product for Your Distribution Catalog?
- Reduced After-Sales Costs: Utilizing 100% laser welding technology, this product completely solves the industry pain point of drill bit detachment during dry cutting of hard concrete, protecting the distributor’s brand reputation.
- Easy Inventory Management: The standardized kit includes a carbide center drill and comes with an SDS-Plus adapter and a hex shank adapter. One set of products is compatible with various hammer drills and electric drills used by end customers, eliminating the need for separate inventory for machines with different interfaces.
- Excellent Versatility: Precise 68mm and 82mm dimensions fully cover the installation standards of mainstream concealed electrical junction boxes worldwide (available in 5/8-11 and M16 thread specifications).
- Source Support: Supports OEM customization for bulk orders, including barrel paint and laser marking. With the production capacity of the source factory, your supply chain is guaranteed to be absolutely stable.
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