TopGroove™ Machining Guidelines Machining Guidelines for Face Grooving Operations • Internal LH insert LH bar minimum Boring Bars groove “E” C RH bar diameter RH insert D groove depth Standard NG/NGD Inserts maximum minimum groove depth B groove diameter C insert family mm mm NFD-3-KI 6,35 63,5 NOTE: Also check minimum bore diameter of boring bar. See page E78. widia.com E91