Tungaloy America's TCB series counterboring tool diameters range from 26mm to 59mm (1.02" to 2.32"), and inserts with the –CG style chipbreaker geometry yield consistent chip flow in various materials at a range of cutting depths.
The expanded TCB line incorporates a cartridge design for easy diameter adjustments. It can be adjusted by placing multiple-sized shims between the tool body and cartridge, enabling a single tool body to machine various diameters. Fine diameter adjustments in increments of 0.100mm (0.004") are also possible with thinner shims sold separately. See Tungaloy America Inc. at IMTS 2018 in Booth #421822.