... PDC Drill Bits 1.Cover All IADC Code of PDC Bit 2.Offer All Kinds Of PDC Bits Sizes 3.Number Of Blade ... :4,5,6,7,8,9 The AIM of Hejian Yinhai Rock Bits ... welded to the body as cutting edges.PDC bit is mainly used for geological prospecting, ... of high performance PDC compacts significantly prolongs bit life.4. Evolute asymmetrical blade cutter design and balanced ...