apdepth of cut (mm)apdepth of cut (mm)apdepth of cut (mm)apdepth of cut (mm) Small Hole Boring Chipbreaker Geometries „Single-Sided, Positive Inserts ..HH Peripheral ground for best surface quality and reduced cutting pressure.For fine to medium finishes.P M feed rate (mm) fn HP High positive-type chipbreaker. Peripheral ground for best surface qualityand reduced cutting pressure. Recommended for high-temp alloys andP non-ferrous machining. M feed rate (mm) fn ..HH-R/L Ground-in chipbreaker. Peripheral ground for best surface quality andreduced cutting pressure. P *Right-hand inserts used in left-hand bars ONLY. Left-hand inserts used in right-hand bars ONLY. feed rate (mm) fn ..HW Flat insert for profiling. Very stable cutting edge offers maximum rigidity. P M feed rate (mm) fn D36 widia.com