... 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 Co. LTD: FOCUS AND DEDICATION TO BRING THE VALUE. ... to the body as cutting edges.PDC bit is mainly used for geological prospecting,coal exploration,water conservancy and power ... so that bit whirl is prevented.5. It can be used widely, more suitable for drilling in the stratum with ...