Core Drill Bits and Barrels

CT-CMP-BITS are diamond core drill bits and matching core barrels used to cut cylindrical plugs from whole core and rock samples for routine and special core analysis. They are consumables for a plugging drill in the core preparation laboratory. Three standard plug diameters are listed: 1 in, 30 mm and 1.5 in.

How it works

The bit is a thin-walled tubular cutter with a diamond-set crown. As the drill turns and feeds the bit into the rock, the crown cuts an annular groove and leaves a cylinder of rock inside the tube. The barrel behind the bit holds the cut plug and transmits the drive from the drill spindle. The bit inner diameter sets the plug diameter, so the bit size is chosen from the plug size required by the downstream test, for example the core holder bore.

Bit size, diamond matrix and barrel type are supplied to requirement. The matrix is selected for the rock type and hardness; the barrel is selected for the drilling machine and for the plug length to be recovered.

What is included

• Diamond core drill bit in the selected diameter
• Core barrel of the selected type
• Further drilling consumables to requirement

Standard sizes

Specify for your project

• Plug diameter: 1 in, 30 mm or 1.5 in, or another size
• Rock type and hardness, to select the diamond matrix
• Drilling machine or spindle the barrel must fit
• Plug length to be recovered
• Quantity of bits and barrels, and spares

This description defines the product family. Guaranteed performance, included hardware, exclusions, interfaces and acceptance criteria are stated only in the project-specific technical proposal and approved datasheet.

Standard diameters:

• 1"
• 30 mm
• 1,5"