Diamond core drill bit GEKO 42x10x450 mm 3T 1.1/4" for dry and wet drilling

Diamond core drill bit GEKO 42x10x450 mm 3T 1.1/4" for dry and wet drilling is a cylindrical cutting tool intended for making accurate circular holes in hard materials such as concrete, masonry and brick. The tool combines a long shaft for deeper penetration with diamond cutting segments that provide effective material removal in both wet and dry working conditions. The 1.1/4" connection ensures compatibility with common core drilling machines and rotary tools that accept this thread size.

Advantages

The diamond segments offer high abrasion resistance and steady cutting performance, extending the service life of the bit compared with conventional carbide cutters. The long 450 mm overall length enables drilling deeper holes without changing extensions, and the 3T tooth arrangement helps maintain stable cutting and faster core extraction. The bit is suitable for both wet and dry use, allowing flexibility for different jobsite conditions and reducing downtime for tool changes.

Suitable for

• Drilling clean circular holes in reinforced concrete and plain concrete
• Creating openings in brickwork and masonry for plumbing, electrical and HVAC installations
• Core sampling and conduit or pipe passage preparation
• Indoor and outdoor drilling where wet or dry methods are required

Key specifications

• Cutting diameter: 42 mm
• Cutting depth / segment length: 10 mm
• Overall length / shaft length: 450 mm
• Tooth arrangement: 3T (three segments)
• Connection thread type: 1.1/4" compatible thread for core drill machines
• Suitable drilling methods: dry drilling and wet drilling
• Typical target materials: concrete, masonry, brick

How to use

Mount the diamond core drill bit securely to a compatible core drilling machine or rotary tool using the 1.1/4" connection. Align the bit with the intended center point of the hole and start drilling at low speed to establish a guide groove. Increase speed and feed gradually while keeping the tool steady; use consistent pressure without forcing the bit. For wet drilling, supply a controlled water flow to cool the segments and remove slurry. For dry drilling, follow the manufacturer’s recommendations for intermittent drilling and cooling pauses to avoid overheating.

Usage recommendations

Use appropriate personal protective equipment such as eye protection, dust mask or respirator, hearing protection and gloves. When drilling reinforced concrete, take care to avoid striking rebar; if rebar is encountered, reduce feed pressure and use pulsed drilling. Select wet drilling when maximum segment life and dust suppression are priorities; choose dry drilling only where water cannot be used and apply intermittent operation to manage heat.