feed rate [mm]feed rate [mm]feed rate [mm] TopGroove™ Feed Values for Grooving Inserts TopGroove • NG -K, NG-1L, and NG • Chip control enables true optimisation and productivity. • For general-purpose, O-ring, and circlip grooving applications. • Precision ground for accurate NG-K NG edge location. • Can be used in both toolholders and boring bars. width of cut [mm] 1 Recommended Starting Feed NG-1L TopGroove • NGP and NGD-K • Positive rake angles. • For deep, O-ring, circlip, and general- purpose grooving applications. • Chip geometry for excellent chip control. • Precision ground for accurate NGP NGD-K edge location. • Can be used in both toolholders and boring bars. width of cut [mm] 1 Recommended Starting Feed TopGroove • NR and NR-K • For full radius grooving and turning profiling applications. • Chip geometry for excellent chip control. • Precision ground for accurate edge location. NR NR-K • Can be used in both toolholders and boring bars. width of cut [mm] 1 Recommended Starting Feed widia.com E49