The term “impregnation depth” refers to the thickness of the diamond impregnated matrix layer on a core bit crown as shown in the illustrations below.

Impregnation Depths for V-Ring Profile (Style ‘V’) Core Bits

This bit crown profile is offered in standard impregnation depths of 6 mm (0.24 inch), 9 mm (0.35 inch), 12 mm (0.47 inch), and 16 mm (0.63 inch).

Note that impregnation depths greater than 9 mm (0.35 inch) are not available for thin-wall core bits with kerf widths of less than 0.33 inch (8.4 mm).

Impregnation Depths for Flat-Face Profile (Style ‘F’) Core Bits

This bit crown profile is offered in standard impregnation depths of 6 mm (0.24 inch), 9 mm (0.35 inch), 12 mm (0.47 inch), and 16 mm (0.63 inch).

Note that impregnation depths greater than 9 mm (0.35 inch) are not available for thin-wall core bits with kerf widths of less than 0.33 inch (8.4 mm).

Impregnation Depths for Tapered Profile (Style ‘TP’) Core Bits

This bit crown profile is offered in standard impregnation depths of 6 mm (0.24 inch), 9 mm (0.35 inch) and 12 mm (0.47 inch).

Impregnation Depths for Semi-Round Profile (Style ‘U’) Core Bit

This bit crown profile is only intended for use on core bits with very thick kerf widths. It is available in customer specified impregnation depths ranging from 9 mm (0.35 inch) through 16 mm (0.63 inch) inclusive.